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## Engage NY Eureka Math 2nd Grade Module 4 Lesson 18 Answer Key

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### Eureka Math Grade 2 Module 4 Lesson 18 Sprint Answer Key

38 + 1 = 39, 47 + 2 = 49, 56 + 3 = 59, 65 + 4 = 69, 31 + 8 = 39, 42 + 7 = 49, 53 + 6 = 59, 64 + 5 = 69, 49 + 1 = 50, 49 + 2 = 51, 49 + 3 = 52, 49 + 5 = 54, 58 + 2 = 60, 58 + 3 = 61, 58 + 4 = 62, 58 + 6 = 64, 67 + 3 = 70, 57 + 4 = 61, 57 + 5 = 62, 57 + 7 = 64, 85 + 5 = 90, 85 + 6 = 91, 85 + 7 = 92, 85 + 9 = 94, 76 + 4 = 80, 76 + 5 = 81, 76 + 6 = 82, 76 + 9 = 85, 64 + 6 = 70, 64 + 7 = 71, 76 + 8 = 84, 43 + 7 = 50, 43 + 8 = 51, 43 + 9 = 52, 52 + 8 = 60, 52 + 9 = 61, 59 + 1 = 60, 59 + 3 = 62, 58 + 2 = 60, 58 + 4 = 62, 77 + 3 = 80, 77 + 5 = 82, 35 + 5 = 40, 35 + 8 = 43.

Explanation:
In the above-given question,
given that,
38 + 1 = 39, 47 + 2 = 49, 56 + 3 = 59, 65 + 4 = 69, 31 + 8 = 39, 42 + 7 = 49, 53 + 6 = 59, 64 + 5 = 69, 49 + 1 = 50, 49 + 2 = 51, 49 + 3 = 52, 49 + 5 = 54, 58 + 2 = 60, 58 + 3 = 61, 58 + 4 = 62, 58 + 6 = 64, 67 + 3 = 70, 57 + 4 = 61, 57 + 5 = 62, 57 + 7 = 64, 85 + 5 = 90, 85 + 6 = 91, 85 + 7 = 92, 85 + 9 = 94, 76 + 4 = 80, 76 + 5 = 81, 76 + 6 = 82, 76 + 9 = 85, 64 + 6 = 70, 64 + 7 = 71, 76 + 8 = 84, 43 + 7 = 50, 43 + 8 = 51, 43 + 9 = 52, 52 + 8 = 60, 52 + 9 = 61, 59 + 1 = 60, 59 + 3 = 62, 58 + 2 = 60, 58 + 4 = 62, 77 + 3 = 80, 77 + 5 = 82, 35 + 5 = 40, 35 + 8 = 43.

Question 1.
38 + 1 = 39.

38 + 1 = 39.

Explanation:
In the above-given question,
given that,
38 + 1 = 39.
39 – 1 = 38.

Question 2.
47 + 2 = 49.

47 + 2 = 49.

Explanation:
In the above-given question,
given that,
47 + 2 = 49.
49 – 2 = 47.

Question 3.
56 + 3 = 59.

56 + 3 = 59.

Explanation:
In the above-given question,
given that,
56 + 3 = 59.
59 – 3 = 56.

Question 4.
65 + 4 = 69.

65 + 4 = 69.

Explanation:
In the above-given question,
given that,
65 + 4 = 69.
69 – 4 = 65.

Question 5.
31 + 8 = 39.

31 + 8 = 39.

Explanation:
In the above-given question,
given that,
31 + 8 = 39.
39 – 8 = 31.

Question 6.
42 + 7 = 49.

42 + 7 = 49.

Explanation:
In the above-given question,
given that,
42 + 7 = 49.
49 – 7 = 42.

Question 7.
53 + 6 = 59.

53 + 6 = 59.

Explanation:
In the above-given question,
given that,
53 + 6 = 59.
59 – 6 = 53.

Question 8.
64 + 5 = 69.

64 + 5 = 69.

Explanation:
In the above-given question,
given that,
64 + 5 = 69.
69 – 5 = 64.

Question 9.
49 + 1 = 50.

49 + 1 = 50.

Explanation:
In the above-given question,
given that,
49 + 5 = 50.
50 – 5 = 49.

Question 10.
49 + 2 = 51.

49 + 2 = 51.

Explanation:
In the above-given question,
given that,
49 + 2 = 51.
51 – 2 = 49.

Question 11.
49 + 3 = 52.

49 + 3 = 52.

Explanation:
In the above-given question,
given that,
49 + 3 = 52.
52 – 3 = 49.

Question 12.
49 + 5 = 54.

49 + 5 = 54.

Explanation:
In the above-given question,
given that,
49 + 5 = 54.
54 – 5 = 49.

Question 13.
58 + 2 = 60.

58 + 2 = 60.

Explanation:
In the above-given question,
given that,
58 + 2 = 60.
60 – 2 = 58.

Question 14.
58 + 3 = 61.

58 + 3 = 61.

Explanation:
In the above-given question,
given that,
58 + 3 = 61.
61 – 3 = 58.

Question 15.
58 + 4 = 62.

58 + 4 = 62.

Explanation:
In the above-given question,
given that,
58 + 4 = 62.
62 – 4 = 58.

Question 16.
58 + 6 = 64.

58 + 6 = 64.

Explanation:
In the above-given question,
given that,
58 + 8 = 64.
64 – 8 = 58.

Question 17.
67 + 3 = 70.

67 + 3 = 70.

Explanation:
In the above-given question,
given that,
67 + 3 = 70.
70 – 3 = 67.

Question 18.
57 + 4 = 61.

57 + 4 = 61.

Explanation:
In the above-given question,
given that,
57 + 4 = 61.
61 – 4 = 57.

Question 19.
57 + 5 = 62.

57 + 5 = 62.

Explanation:
In the above-given question,
given that,
57 + 5 = 62.
62 – 5 = 57.

Question 20.
57 + 7 = 64.

57 + 7 = 64.

Explanation:
In the above-given question,
given that,
57 + 7 = 64.
64 – 7 = 57.

Question 21.
85 + 5 = 90.

85 + 5 = 90.

Explanation:
In the above-given question,
given that,
85 + 5 = 90.
90 – 5 = 85.

Question 22.
85 + 6 = 91.

85 + 6 = 91.

Explanation:
In the above-given question,
given that,
85 + 6 = 91.
91 – 6 = 85.

Question 23.
85 + 7 = 92.

85 + 7 = 92.

Explanation:
In the above-given question,
given that,
85 + 7 = 92.
92 – 7 = 85.

Question 24.
85 + 9 = 94.

85 + 9 = 94.

Explanation:
In the above-given question,
given that,
85 + 9 = 94.
94 – 9 = 85.

Question 25.
76 + 4 = 80.

76 + 4 = 80.

Explanation:
In the above-given question,
given that,
76 + 4 = 80.
80 – 4 = 76.

Question 26.
76 + 5 = 81.

76 + 5 = 81.

Explanation:
In the above-given question,
given that,
76 + 5 = 81.
81 – 5 = 76.

Question 27.
76 + 6 = 82.

76 + 6 = 82.

Explanation:
In the above-given question,
given that,
76 + 6 = 82.
82 – 6 = 76.

Question 28.
76 + 9 = 85.

76 + 9 = 85.

Explanation:
In the above-given question,
given that,
76 + 9 = 85.
85 – 9 = 76.

Question 29.
64 + 6 = 70.

64 + 6 = 70.

Explanation:
In the above-given question,
given that,
64 + 6 = 70.
70 – 6 = 64.

Question 30.
64 + 7 = 71.

64 + 7 = 71.

Explanation:
In the above-given question,
given that,
64 + 7 = 71.
71 – 7 = 64.

Question 31.
76 + 8 = 84.

76 + 8 = 84.

Explanation:
In the above-given question,
given that,
76 + 8 = 84.
84 – 8 = 76.

Question 32.
43 + 7 = 50.

43 + 7 = 50.

Explanation:
In the above-given question,
given that,
43 + 7 = 50.
50 – 7 = 43.

Question 33.
43 + 8 = 51.

43 + 8 = 51.

Explanation:
In the above-given question,
given that,
43 + 8 = 51.
51 – 8 = 43.

Question 34.
43 + 9 = 52.

43 + 9 = 52.

Explanation:
In the above-given question,
given that,
43 + 9 = 52.
52 – 9 = 43.

Question 35.
52 + 8 = 60.

52 + 8 = 60.

Explanation:
In the above-given question,
given that,
52 + 8 = 60.
60 – 8 = 52.

Question 36.
52 + 9 = 61.

52 + 9 = 61.

Explanation:
In the above-given question,
given that,
52 + 9 = 61.
61 – 9 = 52.

Question 37.
59 + 1 = 60.

59 + 1 = 60.

Explanation:
In the above-given question,
given that,
59 + 1 = 60.
60 – 1 = 59.

Question 38.
59 + 3 = 62.

59 + 3 = 62.

Explanation:
In the above-given question,
given that,
59 + 3 = 62.
62 – 3 = 59.

Question 39.
58 + 2 = 60.

58 + 2 = 60.

Explanation:
In the above-given question,
given that,
58 + 2 = 60.
60 – 2 = 58.

Question 40.
58 + 4 = 62.

58 + 4 = 62.

Explanation:
In the above-given question,
given that,
58 + 4 = 62.
62 – 4 = 58.

Question 41.
77 + 3 = 80.

77 + 3 = 80.

Explanation:
In the above-given question,
given that,
77 + 3 = 80.
80 – 3 = 77.

Question 42.
77 + 5 = 82.

77 + 5 = 82.

Explanation:
In the above-given question,
given that,
77 + 5 = 82.
82 – 5 = 77.

Question 43.

35 + 5 = 40.

Explanation:
In the above-given question,
given that,
35 + 5 = 40.
40 – 5 = 35.

35 + 8 = 43.

Explanation:
In the above-given question,
given that,
35 + 5 = 40.
40 – 5 = 35.

Question 44.
35 + 8 = 43.

35 + 8 = 43.

Explanation:
In the above-given question,
given that,
35 + 8 = 43.
43 – 8 = 35.

28 + 1 = 29, 37 + 2 = 39, 46 + 3 = 49, 55 + 4 = 59, 21 + 8 = 29, 32 + 7 = 39, 43 + 6 = 49, 54 + 5 = 59, 39 + 1 = 40, 39 + 2 = 41, 39 + 3 = 42, 39 + 5 = 44, 48 + 2 = 50, 48 + 3 = 51, 48 + 4 = 52, 48 + 6 = 54, 57 + 3 = 60, 57 + 4 = 61, 57 + 5 = 62, 57 + 7 = 64, 75 + 5 = 80, 75 + 6 = 81, 75 + 7 = 82, 75 + 9 = 84, 66 + 4 = 70, 66 + 5 = 71, 66 + 6 = 72, 66 + 9 = 75, 54 + 6 = 60, 54 + 7 = 61, 54 + 8 = 62, 33 + 7 = 40, 33 + 8 = 41, 33 + 9 = 42, 42 + 8 = 50, 42 + 9 = 51, 49 + 1 = 50, 49 + 3 = 52, 58 + 2 = 60, 58 + 4 = 62, 67 + 3 = 70, 67 + 5 = 72, 85 + 5 = 90, 85 + 8 = 93.

Explanation:
In the above-given question,
given that,
28 + 1 = 29, 37 + 2 = 39, 46 + 3 = 49, 55 + 4 = 59, 21 + 8 = 29, 32 + 7 = 39, 43 + 6 = 49, 54 + 5 = 59, 39 + 1 = 40, 39 + 2 = 41, 39 + 3 = 42, 39 + 5 = 44, 48 + 2 = 50, 48 + 3 = 51, 48 + 4 = 52, 48 + 6 = 54, 57 + 3 = 60, 57 + 4 = 61, 57 + 5 = 62, 57 + 7 = 64, 75 + 5 = 80, 75 + 6 = 81, 75 + 7 = 82, 75 + 9 = 84, 66 + 4 = 70, 66 + 5 = 71, 66 + 6 = 72, 66 + 9 = 75, 54 + 6 = 60, 54 + 7 = 61, 54 + 8 = 62, 33 + 7 = 40, 33 + 8 = 41, 33 + 9 = 42, 42 + 8 = 50, 42 + 9 = 51, 49 + 1 = 50, 49 + 3 = 52, 58 + 2 = 60, 58 + 4 = 62, 67 + 3 = 70, 67 + 5 = 72, 85 + 5 = 90, 85 + 8 = 93.

Question 1.
28 + 1 = 29.

28 + 1 = 29.

Explanation:
In the above-given question,
given that,
28 + 1 = 29.
29 – 1 = 28.

Question 2.
37 + 2 = 39.

37 + 2 = 39.

Explanation:
In the above-given question,
given that,
37 + 2 = 39.
39 – 2 = 37.

Question 3.
46 + 3 = 49.

46 + 3 = 49.

Explanation:
In the above-given question,
given that,
46 + 3 = 49.
49 – 3 = 46.

Question 4.
55 + 4 = 59.

55 + 4 = 59.

Explanation:
In the above-given question,
given that,
55 + 4 = 59.
59 – 4 = 55.

Question 5.
21 + 8 = 29.

21 + 8 = 29.

Explanation:
In the above-given question,
given that,
21 + 8 = 29.
29 – 8 = 21.

Question 6.
32 + 7 = 39.

32 + 7 = 39.

Explanation:
In the above-given question,
given that,
32 + 7 = 39.
39 – 7 = 32.

Question 7.
43 + 6 = 49.

43 + 6 = 49.

Explanation:
In the above-given question,
given that,
43 + 6 = 49.
49 – 6 = 43.

Question 8.
54 + 5 = 59.

54 + 5 = 59.

Explanation:
In the above-given question,
given that,
54 + 5 = 59.
59 – 5 = 54.

Question 9.
39 + 1 = 40.

39 + 1 = 40.

Explanation:
In the above-given question,
given that,
39 + 1 = 40.
40 – 1 = 39.

Question 10.
39 + 2 = 41.

39 + 2 = 41.

Explanation:
In the above-given question,
given that,
39 + 2 = 41.
41 – 2 = 39.

Question 11.
39 + 3 = 42.

39 + 3 = 42.

Explanation:
In the above-given question,
given that,
39 + 3 = 42.
42 – 3 = 39.

Question 12.
39 + 5 = 44.

39 + 5 = 44.

Explanation:
In the above-given question,
given that,
39 + 5 = 44.
44 – 5 = 39.

Question 13.
48 + 2 = 50.

48 + 2 = 50.

Explanation:
In the above-given question,
given that,
48 + 2 = 50.
50 – 2 = 48.

Question 14.
48 + 3 = 51.

48 + 3 = 51.

Explanation:
In the above-given question,
given that,
48 + 3 = 51.
51 – 3 = 48.

Question 15.
48 + 4 = 52.

48 + 4 = 52.

Explanation:
In the above-given question,
given that,
48 + 4 = 52.
52 – 4 = 48.

Question 16.
48 + 6 = 54.

48 + 6 = 54.

Explanation:
In the above-given question,
given that,
48 + 6 = 54.
54 – 6 = 48.

Question 17.
57 + 3 = 60.

57 + 3 = 60.

Explanation:
In the above-given question,
given that,
57 + 3 = 60.
60 – 3 = 57.

Question 18.
57 + 4 = 61.

57 + 4 = 61.

Explanation:
In the above-given question,
given that,
57 + 4 = 61.
61 – 4 = 57.

Question 19.
57 + 5 = 62.

57 + 5 = 62.

Explanation:
In the above-given question,
given that,
57 + 5 = 62.
62 – 5 = 57.

Question 20.
57 + 7 = 64.

57 + 7 = 64.

Explanation:
In the above-given question,
given that,
57 + 7 = 64.
64 – 7 = 57.

Question 21.
75 + 5 = 80.

75 + 5 = 80.

Explanation:
In the above-given question,
given that,
75 + 5 = 80.
80 – 5 = 75.

Question 22.
75 + 6 = 81.

75 + 6 = 81.

Explanation:
In the above-given question,
given that,
75 + 6 = 81.
81 – 6 = 75.

Question 23.
75 + 7 = 82.

75 + 7 = 82.

Explanation:
In the above-given question,
given that,
75 + 7 = 82.
82 – 7 = 75.

Question 24.
75 + 9 = 84.

75 + 9 = 84.

Explanation:
In the above-given question,
given that,
75 + 9 = 84.
84 – 9 = 75.

Question 25.
66 + 4 = 70.

66 + 4 = 70.

Explanation:
In the above-given question,
given that,
66 + 4 = 70.
70 – 4 = 66.

Question 26.
66 + 5 = 71.

66 + 5 = 71.

Explanation:
In the above-given question,
given that,
66 + 5 = 71.
71 – 5 = 66.

Question 27.
66 + 6 = 72.

66 + 6 = 72.

Explanation:
In the above-given question,
given that,
66 + 6 = 72.
72 – 6 = 66.

Question 28.
66 + 9 = 75.

66 + 9 = 75.

Explanation:
In the above-given question,
given that,
66 + 9 = 75.
75 – 9 = 66.

Question 29.
54 + 6 = 60.

54 + 6 = 60.

Explanation:
In the above-given question,
given that,
54 + 6 = 60.
60 – 6 = 54.

Question 30.
54 + 7 = 61.

54 + 7 = 61.

Explanation:
In the above-given question,
given that,
54 + 7 = 61.
61 – 7 = 54.

Question 31.
54 + 8 = 62.

54 + 8 = 62.

Explanation:
In the above-given question,
given that,
54 + 8 = 62.
62 – 8 = 54.

Question 32.
33 + 7 = 40.

33 + 7 = 40.

Explanation:
In the above-given question,
given that,
33 + 7 = 40.
40 – 7 = 33.

Question 33.
33 + 8 = 41.

33 + 8 = 41.

Explanation:
In the above-given question,
given that,
33 + 8 = 41.
41 – 8 = 33.

Question 34.
33 + 9 = 42.

33 + 9 = 42.

Explanation:
In the above-given question,
given that,
33 + 9 = 42.
42 – 9 = 33.

Question 35.
42 + 8 = 50.

42 + 8 = 50.

Explanation:
In the above-given question,
given that,
42 + 8 = 50.
50 – 8 = 42.

Question 36.
42 + 9 = 51.

42 + 9 = 51.

Explanation:
In the above-given question,
given that,
42 + 9 = 51.
51 – 9 = 42.

Question 37.
49 + 1 = 50.

49 + 1 = 50.

Explanation:
In the above-given question,
given that,
49 + 1 = 50.
50 – 1 = 49.

Question 38.
49 + 3 = 52.

49 + 3 = 52.

Explanation:
In the above-given question,
given that,
49 + 3 = 52.
52 – 3 = 49.

Question 39.
58 + 2 = 60.

58 + 2 = 60.

Explanation:
In the above-given question,
given that,
58 + 2 = 60.
60 – 2 = 58.

Question 40.
58 + 4 = 62.

58 + 4 = 62.

Explanation:
In the above-given question,
given that,
58 + 4 = 62.
62 – 4 = 58.

Question 41.
67 + 3 = 70.

67 + 3 = 70.

Explanation:
In the above-given question,
given that,
67 + 3 = 70.
70 – 3 = 67.

Question 42.
67 + 5 = 72.

67 + 5 = 72.

Explanation:
In the above-given question,
given that,
67 + 5 = 72.
72 – 5 = 67.

Question 43.
85 + 5 = 90.

85 + 5 = 90.

Explanation:
In the above-given question,
given that,
85 + 5 = 90.
90 – 5 = 85.

Question 44.
85 + 8 = 93.

85 + 8 = 93.

Explanation:
In the above-given question,
given that,
85 + 8 = 93.
93 – 8 = 85.

### Eureka Math Grade 2 Module 4 Lesson 18 Problem Set Answer Key

Question 1.
Solve using your place value chart and place value disks.
a. 80 + 30 = ___110_____                  90 + 40 = __130_______

80 + 30 = 110.
90 + 40 = 130.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
8 x 10 = 80.
3 x 10 = 30.
80 + 30 = 110.
9 x 10 = 90.
4 x 10 = 40.
90 + 40 = 130.

b. 73 + 38 = ____111____                  73 + 49 = ____122_____

73 + 38 = 111.
73 + 49 = 122.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
7 x 10 = 70.
3 x 1 = 30.
3 x 10 = 30.
8 x 1  = 8.
73 + 38 = 111.
73 + 49 = 122.

c. 93 + 38 = ___131_____                  42 + 99 = ____141_____

93 + 38 = 131.
42 + 99 = 141.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
9 x 10 = 90.
3 x 1 = 3.
3 x 10 = 30.
8 x 1 = 8.
90 + 3  = 93.
30 + 8 = 38.
93 + 38 = 131.

d. 84 + 37 = __121______                  69 + 63 = __132_______

84 + 37 = 121.
69 + 63 = 132.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
8 x 10 = 80.
4 x 1 = 4.
3 x 10 = 30.
7 x 1 = 7.
80 + 4 = 84.
30 + 7 = 37.
84 + 37 = 121.
69 + 63 = 132.

e. 113 + 78 = ___191_____                 128 + 72 = ____200_____

113 + 78 = 191.
128 + 72 = 200.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
1 x 100 = 100.
1 x 10 = 10.
3 x 1 = 3.
100 + 10 + 3 = 113.
7 x 10 = 70.
8 x 1 = 8.
70 + 8 = 78.

Question 2.
Circle the statements that are true as you solve each problem using place value disks.

 a. 47 + 123 b. 97 + 54 I change 10 ones for 1 ten. I change 10 ones for 1 ten. I change 10 tens for 1 hundred. I change 10 tens for 1 hundred. The total of the two parts is 160. The total of the two parts is 141. The total of the two parts is 170. The total of the two parts is 151.

47 + 123 = 170.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
7 x 1 = 7.
40 + 7 = 47.
1 x 100 = 100.
2 x 10 = 20.
3 x 1 = 3.
100 + 20 + 3 = 123.

Question 3.
Write an addition sentence that corresponds to the following number bond.
Solve the problem using your place value disks, and fill in the missing total.

45 + 95 = 140.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
5 x 1 = 5.
9 x 10 = 90.
5 x 1 = 5.
40 + 5 = 45.
90 + 5 = 95.
45 + 95 = 140.

Question 4.
There are 50 girls and 80 boys in the after school program. How many children are in the after school program?

The number of children is in the after school program = 130.

Explanation:
In the above-given question,
given that,
There are 50 girls and 80 boys in the after school program.
girls = 50.
boys = 80.
50 + 80 = 130.

Question 5.
Kim and Stacy solved 83 + 39. Kim’s answer was less than 120. Stacy’s answer was more than 120. Whose answer was incorrect? Explain how you know using words, pictures, or numbers.

Stacy was correct.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
Kim and Stacy solved 83 + 39 = 122.
Kim’s answer was less than 120.
Stacy’s answer was more than 120.
83 + 39 = 122.
so Stacy was correct.

### Eureka Math Grade 2 Module 4 Lesson 18 Exit Ticket Answer Key

Solve using your place value chart and place value disks.

Question 1.
46 + 54 = ____100_____

46 + 54 = 100.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
6 x 1 = 6.
5 x 10 = 50.
4 x 1 = 4.
40 + 6 = 46.
50 + 4 = 54.
46 + 54 = 100.

Question 2.
49 + 56 = ____105_____

49 + 56 = 105.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
9 x 1 = 9.
40 + 9 = 49.
5 x 10 = 50.
6 x 1 = 6.
50 + 6 = 56.
49 + 56 = 105.

Question 3.
28 + 63 = ____91_____

28 + 63 = 91.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
2 x 10 = 20.
8 x 1 = 8.
20 + 8 = 28.
6 x 10 = 60.
3 x 1 = 3.
60 + 3 = 63.
28 + 63 = 91.

Question 4.
67 + 89 = __156_______

67 + 89 = 156.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
6 x 10 = 60.
7 x 1 = 7.
8 x 10 = 80.
9 x 1 = 9.
60 + 7 = 67.
80 + 9 = 89.
67 + 89 = 156.

### Eureka Math Grade 2 Module 4 Lesson 18 Homework Answer Key

Question 1.
Solve using your place value chart and place value disks.
a. 20 + 90 = ___110_____                  60 + 70 = ___130______

20 + 90 = 110.
60 + 70 = 130.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
2 x 10 = 20.
9 x 10 = 90.
20 + 90 = 110.
6 x 10 = 60.
7 x 10 = 70.
60 + 70 = 130.

b. 29 + 93 = ___122_____                 69 + 72 = __141_______

29 + 93 = 122.
69 + 72 = 141.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
2 x 10 = 20.
9 x 1 = 9.
20 + 9 = 29.
9 x 10 = 90.
3 x 1 = 3.
90 + 3 = 93.
29 + 93 = 122.
69 + 72 = 141.

c. 45 + 86 = ____131____                  46 + 96 = ___142______

45 + 86 = 131.
46 + 96 = 142.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
5 x 1 = 5.
8 x 10 = 80.
6 x 1 = 6.
40 + 5 = 45.
80 + 6 = 86.
45 + 86 = 131.
46 + 96 = 142.

d. 47 + 115 = ___162_____                47 + 95 = ____142_____

47 + 115 = 162.
47 + 95 = 142.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
7 x 1 = 7.
1 x 100 = 100.
1 x 10 = 10.
5 x 1 = 5.
100 + 10 + 5 = 115.
47 + 115 = 162.

e. 28 + 72 = ____100____                  28 + 72 = ____100_____

28 + 72 = 100.
28 + 72 = 100.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
2 x 10 = 20.
8 x 1 = 8.
20 + 8 = 28.
7 x 10 = 70.
2 x 1 = 2.
70 + 2 = 72.
28 + 72 = 100.

Question 2.
Circle the statements that are true as you solve each problem using place value disks.

 a. 68  + 51 b. 127 + 46 I change 10 ones for 1 ten. I change 10 ones for 1 ten. I change 10 tens for 1 hundred. I change 10 tens for 1 hundred. The total of the two parts is 109. The total of the two parts is 163. The total of the two parts is 119. The total of the two parts is 173.

68 + 51 = 119.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
6 x 10 = 60.
8 x 1 = 8.
5 x 10 = 50.
1 x 1 = 1.
60 + 8 = 68.
50 + 1 = 51.
68 + 51 = 119.

127 + 46 = 173.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
1 x 100 = 100.
2 x 10 = 20.
7 x 1 = 7.
100 + 20 + 7 = 127.
4 x 10 = 40.
6 x 1 = 6.
40 + 6 = 46.
127 + 46 = 173.

Question 3.
Solve the problem using your place value disks, and fill in the missing total. Then, write an addition sentence that relates to the number bonds.
a.

___86__+__57__=__143_________

86 + 57 = 143.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
8 x 10 = 80.
6 x 1 = 6.
80 + 6 = 86.
5 x 10 = 50.
7 x 1 = 7.
50 + 7 = 57.
86 + 57 = 143.

b.

___129__+__78__=__207_________

129 + 78 = 207.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
1 x 100 = 100.
2 x 10 = 20.
9 x 1 = 9.
100 + 20 + 9 = 129.
7 x 10 = 70.
8 x 1 = 8.
70 + 8 = 78.
129 + 78 = 207.

Question 4.
Solve using your place value chart and place value disks.
a. 45 + 55 = ___100_____

45 + 55 = 100.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
4 x 10 = 40.
4 x 1 = 4.
5 x 10 = 50.
5 x 1 = 5.
50 + 5 = 55.
40 + 4 = 44.
44 + 55 = 100

b. 78 + 33 = __111______

78 + 33 = 111.

Explanation:
In the above-given question,
given that,
solve using place value chart and place value disks.
7 x 10 = 70.
8 x 1 = 8.
70 + 8 = 78.
3 x 10 = 30.
3 x 1 = 3.
30 + 3 = 33.
78 + 33 = 111.

c. 37 + 84 = ___121_____