All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 11 Missing Addends** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 1 Lesson 11 Missing Addends

**Explore and Explain**

**Teacher Directions:** How many dots do you see? How many dots should there be in all? Draw more dots on the blank side of each domino until you have that number of dots in all. Complete the number sentence.

Explanation:

**See and Show**

You can use a related fact to help you find a missing addend.

**Helpful Hint**

9 is one of the addends. The other addend is missing.

**Find the missing addend. Draw that many dots on the domino.**

Question 1.

Answer:

Explanation:

To find the sum we have to find the difference.

The sum of 8 and 6 is 14

8 + 6 = 14

Question 2.

Answer:

Explanation:

To find the sum we have to find the difference.

The sum of 5 and 6 is 11.

Question 3.

Answer:

Explanation:

To find the sum we have to find the difference.

The sum of 4 and 4 is 8

Question 4.

Answer:

Explanation:

To find the sum we have to find the difference.

The sum of 7 and 8 is 15

**Think Math** How do you find the missing addend in 5 + = 13?

Explanation:

13 – 5 = 8

so, 5 + 8 = 13

To find the sum we have to find the difference.

**Helpful Hint**

To find the missing addend, use related facts.

**On My Own**

**Find the missing addend.**

Question 5.

9 + ___ = 12

12 – 9 = ____

Answer:

9 + 3 = 12

12 – 9 = 3

Explanation:

To find the sum we have to find the difference.

The sum of 9 and 3 is 12

Question 6.

7 + ___ = 8

8 – 7 = ___

Answer:

7 + 1= 8

8 – 7 = 1

Explanation:

To find the sum we have to find the difference.

The sum of 7 and 1 is 8

Question 7.

___ + 6 = 12

12 – 6 = ___

Answer:

3 + 6 = 12

12 – 6 = 3

Explanation:

To find the sum we have to find the difference.

The sum of 3 and 6 is 12

Question 8.

____ + 2 = 7

7 – 2 = ____

Answer:

5 + 2 = 7

7 – 2 = 5

Explanation:

To find the sum we have to find the difference.

The sum of 5 and 2 is 7

Question 9.

7 + ___ = 16

16 – 7 = ____

Answer:

7 + 9 = 16

16 – 7 = 9

Explanation:

To find the sum we have to find the difference.

The sum of 7 and 9 is 16

Question 10.

____ + 7 = 14

14 – 7 = ___

Answer:

7 + 7 = 14

14 – 7 = 7

Explanation:

To find the sum we have to find the difference.

The sum of 7 and 7 is 14

Question 11.

9 + ___ = 9

9 – 9 = ___

Answer:

9 + 0 = 9

9 – 9 = 0

Explanation:

To find the sum we have to find the difference.

The sum of 9 and 0 is 9

Question 12.

6 + ___ = 13

13 – 6 = ___

Answer:

6 + 7 = 13

13 – 6 = 7

Explanation:

To find the sum we have to find the difference.

The sum of 6 and 7 is 13

Question 13.

4 + ___ = 12

12 – 4 = ___

Answer:

4 + 8 = 12

12 – 4 = 8

Explanation:

To find the sum we have to find the difference.

The sum of 4 and 8 is 12

Question 14.

5 + ___ = 12

12 – 5 = ____

Answer:

5 + 7 = 12

12 – 5 = 7

Explanation:

To find the sum we have to find the difference.

The sum of 5 and 7 is 12

**Problem Solving**

Question 15.

There were 14 seals on a rock. Some seals jumped into the water. 9 seals were left on the rock. How many seals jumped into the water?

____ seals

Answer:

5 seals

Explanation:

There were 14 seals on a rock.

Some seals jumped into the water.

9 seals were left on the rock.

14 – 9 = 5

5 seals jumped into the water.

Question 16.

Anna buys 7 plants. She wants 12 plants. How many more plants does Anna need?

____ plants

Answer:

5 plants

Explanation:

Anna buys 7 plants.

She wants 12 plants.

12 – 7 = 5

5 more plants that Anna need.

Question 17.

J.J. wants 16 fish in his aquarium. He has 6 fish now. How many more fish does J.J. need?

____ fish

Answer:

10 fish

Explanation:

J.J. wants 16 fish in his aquarium.

He has 6 fish now.

16 – 6 = 10

10 more fish that J.J. need.

**HOT Problems** Julie found a missing addend like this:

7 + = 9 9 + 7 = 16

Tell what she did wrong. Make it right.

_________________

_________________

_________________

_________________

Explanation:

7 + 2 = 9

9 – 7 = 2

The missing number is 2

Instead of difference they found the sum.

### McGraw Hill My Math Grade 2 Chapter 1 Lesson 11 My Homework Answer Key

**Practice**

**Find the missing addend.**

Question 1.

8 + ___ = 12

12 – 8 = ____

Answer:

8 + 4 = 12

12 – 8 = 4

Explanation:

To find the sum we have to find the difference.

The sum of 8 and 4 is 12

Question 2.

___ + 6 = 15

15 – 6 = ____

Answer:

9 + 6 = 15

15 – 6 = 9

Explanation:

To find the sum we have to find the difference.

The sum of 9 and 6 is 15

Question 3.

8 + ___ = 13

13 – 8 = ___

Answer:

8 + 5 = 13

13 – 8 = 5

Explanation:

To find the sum we have to find the difference.

The sum of 8 and 5 is 13

Question 4.

____ + 7 = 11

11 – 7 = ___

Answer:

4 + 7 = 11

11 – 7 = 4

Explanation:

To find the sum we have to find the difference.

The sum of 4 and 7 is 11

Question 5.

8 + ___ = 17

17 – 8 = ___

Answer:

8 + 9 = 17

17 – 8 = 9

Explanation:

To find the sum we have to find the difference.

The sum of 8 and 7 is 9

Question 6.

9 + ___ = 12

12 – 9 = ___

Answer:

9 + 3 = 12

12 – 9 = 3

Explanation:

To find the sum we have to find the difference.

The sum of 9 and 3 is 12

Question 7.

David and his friends are flying 9 kites. Some kites get stuck in a tree. 7 kites are still flying. How many kites are in the tree?

7 + ____ = 9

____ kites

Answer:

2 kites

Explanation:

David and his friends are flying 9 kites.

Some kites get stuck in a tree.

7 kites are still flying.

9 – 7 = 2

2 kites are in the tree.

Question 8.

The Girl Scouts put some boats in the pond. They leave 9 boats on land. There are 15 r boats altogether. How many boats did the scouts put into the pond?

9 + ___ = 15

___ boats

Answer:

6 boats.

Explanation:

They leave 9 boats on land.

There are 15 r boats altogether.

15 – 9 = 6

6 boats that the scouts put into the pond.

Question 7.

7 boys were riding their bikes. Some of the boys went home. 3 boys are still riding their bikes. How many boys went home?

3 + ___ = 7

____ boys

Answer:

4 boys

Explanation:

7 boys were riding their bikes.

Some of the boys went home.

3 boys are still riding their bikes.

7 – 3 = 4

4 boys went home.

**Vocabulary Check**

**Complete the sentence.**

missing addend sum

Question 10.

When a number sentence only has one addend, you must find the ____ to solve it.

Answer:

missing addend

Explanation:

When a number sentence only has one addend, you must find the missing addend to solve it.

**Math at Home** Ask your child to tell you the subtraction fact that will help him or her find the missing addend in 7 + ___ = 15.