## Engage NY Eureka Math 1st Grade Module 2 Lesson 13 Answer Key

### Eureka Math Grade 1 Module 2 Lesson 13 Problem Set Answer Key

Solve. Use 5-group rows, and cross out to show your work.

Question 1.
Mike has 10 cookies on a plate and 3 cookies in a box. He eats 9 cookies from the plate. How many cookies are left?

Explanation:

Question 2.
Fran has 10 crayons in a box and 5 crayons on the desk. Fran lends Bob 9 crayons from the box. How many crayons does Fran have to use?

Fran has __ crayons to use.

Fran has 6 crayons to use.
Explanation:
Fran has 10 crayons in a box and 5 crayons on the desk. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of 15 can be written as ten and five. Fran lends Bob 9 crayons from the box. So cross out nine crayons. Subtract nine crayons from fifteen crayons then we got six crayons. Fran has six crayons to use.

Question 3.
10 ducks are in the pond, and 7 ducks are on the land. 9 of the ducks in the pond are babies, and all the rest of the ducks are adults. How many adult ducks are there?

Explanation:
There are 10 ducks in the pond, and 7 ducks are on the land. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of seventeen can be written as ten and seven. Nine of the ducks in the pond are babies, and all the rest of the ducks are adults. So cross out nine baby ducks. Subtract nine ducks from seventeen ducks then we got eight ducks. There are eight adult ducks.

With a partner, create your own stories to match, and solve the number sentences.
Make a number bond to show the whole as 10 and some ones. Draw 5-group rows to match your story. Write the complete number sentence on the line.

Question 4.

______

16 – 9 = 7
Explanation:
There were  10 pigs lying in the mud and 6 pigs eating by the trough outside. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of sixteen can be written as ten and six. Nine of the muddy pigs went inside the barn. So cross out nine pigs lying in the mud. Subtract nine pigs from sixteen pigs then we got seven pigs. There are seven pigs stayed outside.

Question 5.

______

12 – 9 = 3
Explanation:
Sunitha has 12 carrots. Ten are on her plate, and two are in the bag. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of twelve can be written as ten and two. She ate 9 of the carrots on her plate. So cross out nine carrots on her plate. Subtract nine carrots from twelve carrots then we got three carrots. Sunitha has three carrots now.

Question 6.

______

19 – 9 = 10
Explanation:
Satya has 19 apples. Ten are on her plate, and nine are in the bag. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of nineteen apples can be written as ten apples and nine apples. She ate 9 of the apples on her plate. So cross out nine apples. Subtract nine apples from nineteen apples then we got ten apples. Satya has ten apples now.

### Eureka Math Grade 1 Module 2 Lesson 13 Exit Ticket Answer Key

Solve. Fill in the number bond. Use 5-group rows, and cross out to show your work.
Gabriela has 4 hair clips in her hair and 10 hair clips in her bedroom. She gives 9 of the hair clips in her room to her sister. How many hair clips does Gabriela have now?

Gabriela has __ hair clips.

Gabriela has 5 hair clips.
Explanation:
Gabriela has 4 hair clips in her hair and 10 hair clips in her bedroom. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of fourteen clips can be written as ten clips and four clips. She gave 9 of the hair clips in her room to her sister. So cross out nine clips in her room. Subtract nine clips from fourteen clips then we got five clips. Gabriela has five hair clips.

### Eureka Math Grade 1 Module 2 Lesson 13 Homework Answer Key

Solve. Use 5-group rows, and cross out to show your work. Write number sentences.

Question 1.
In a park, 10 dogs are running on the grass, and 1 dog is sleeping under the tree. 9 of the running dogs leave the park. How many dogs are left in the park?

There are __ dogs left in the park.

11 – 9 = 2
There are 2 dogs left in the park.
Explanation:
In a park, 10 dogs are running on the grass, and 1 dog is sleeping under the tree. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of eleven dogs can be written as ten dogs and one dog. Nine of the running dogs leave the park. Cross out nine circles from the ten because those stand for the running dogs leave the park. Subtract nine dogs from eleven dogs then we got two dogs. There are two dogs left in the park.

Question 2.
Alejandro had 9 rocks in his yard and 10 rocks in his room. 9 of the rocks in his room are gray rocks, and the rest of the rocks are white. How many white rocks does Alejandro have?

Alejandro has __ white rocks.

19  –  9  =  10
Alejandro has 10 white rocks.
Explanation:
Alejandro had 9 rocks in his yard and 10 rocks in his room. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of nineteen rocks can be written as ten rocks and nine rocks. Nine of the rocks in his room are gray rocks. Subtract nine gray rocks from nineteen rocks then we got ten rocks. Alejandro has ten white rocks.

Question 3.
Sophia has 8 toy cars in the kitchen and 10 toy cars in her bedroom. 9 of the toy cars in the bedroom are blue. The rest of her cars are red. How many red cars does Sophia have?

Sophia has __ red cars.

18  –  9  =  9
Sophia has 9 red cars.
Explanation
Sophia has 8 toy cars in the kitchen and 10 toy cars in her bedroom. A number bond is a simple addition of two numbers that add up to give the sum. In the above image we can observe a number bond of eighteen toy cars can be written as ten toy cars and eight toy cars. 9 of the toy cars in the bedroom are blue. Subtract nine toy cars from eighteen toy cars in order to get red cars. Sophia has nine red cars.

Question 4.
Complete the number bond, and fill in the math story. Use 5-group rows, and cross out to show your work. Write number sentences.

There were ____ birds splashing in a puddle and ____ birds walking on the dry grass. 9 of the splashing birds flew away. How many birds are left?
There are __ birds left.