All the solutions provided in **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 4 Lesson 8 Missing Addends **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 4 Lesson 8 Missing Addends

**Explore and Explain**

Answer:

Explanation:

The butterfly has 7 spots on the left wing and some more spots on its right wing

It has 11 spots in all

11 – 7 = 4

So, there are 4 spots on the right wing.

**Teacher Directions:** Use to model. The butterfly has 7 spots on the left wing and some more spots on its right wing. It has 11 spots in all. How many spots are on the right wing? Trace your counters to show the spots. Trace the missing part.

**See and Show**

**Helpful Hint**

To find the missing part, subtract the known part from the whole.

Use related facts to help you find a missing addend

So, 5 is the missing addend.

**Use Work Mat 3 and Find the missing addend.**

Question 1.

5 + = 13

Think:

13 – 5 =

Answer:

5 + = 12

12 – 5 =

Explanation:

I wrote the missing addend by subtracting

13 – 5 = 8

The missing addend is 8

So, 13 – 5 = 8.

Question 2.

+ 5 = 8

Think:

8 – 5 =

Answer:

+ 5 = 8

8 – 5 =

Explanation:

I wrote the missing addend by subtracting

8 – 5 = 3

The missing addend is 3

So, 3 + 5 = 8.

**Talk Math**

Explain how to find the missing addend in + 5 = 14.

You can find missing addends by subtracting.

Answer:

Explanation:

I wrote the missing addend by subtracting

14 – 5 = 9

The missing addend is 9

So, 9 + 5 = 14.

**On My Own**

**Use Work Mat 3 and Find the missing addend.**

Question 3.

4 + = 10

10 – 4 =

Answer:

4 + = 10

10 – 4 =

Explanation:

I wrote the missing addend by subtracting

10 – 4 = 6

The missing addend is 6

So, 4 + 6 = 10.

Question 4.

+ 6 = 14

14 – 6 =

Answer:

+ 6 = 14

14 – 6 =

Explanation:

I wrote the missing addend by subtracting

14 – 6 = 8

The missing addend is 8

So, 8 + 6 = 14.

Question 5.

8 + = 9

9 – 8 =

Answer:

8 + = 9

9 – 8 =

Explanation:

I wrote the missing addend by subtracting

9 – 8 = 1

The missing addend is 1

So, 8 + 1 = 9.

Question 6.

+ 3 = 11

11 – 3 =

Answer:

+ 3 = 11

11 – 3 =

Explanation:

I wrote the missing addend by subtracting

11 – 3 = 8

The missing addend is 8

So, 8 + 3 = 11.

Question 7.

+ 7 = 13

13 – 7 =

Answer:

+ 7 = 13

13 – 7 =

Explanation:

I wrote the missing addend by subtracting

13 – 7 = 6

The missing addend is 6

So, 6 + 7 = 13.

Question 8.

6 + = 15

15 – 6 =

Answer:

6 + = 15

15 – 6 =

Explanation:

I wrote the missing addend by subtracting

15 – 6 = 9

The missing addend is 9

So, 6 + 9 = 15.

Question 9.

9 + = 17

17 – 9 =

Answer:

9 + = 17

17 – 9 =

Explanation:

I wrote the missing addend by subtracting

17 – 9 = 8

The missing addend is 8

So, 9 + 8 = 17.

Question 10.

9 + = 16

16 – 9 =

Answer:

9 + = 16

16 – 9 =

Explanation:

I wrote the missing addend by subtracting

16 – 9 = 7

The missing addend is 7

So, 9 + 7 = 16.

**Problem Solving**

Question 11.

Max has 5 shovels and some sand pails at the beach. He has 14 shovels and sand pails in all. How many sand pails does he have?

_______ sand pails

Answer:

sand pails

Explanation:

Max has 5 shovels and some sand pails at the beach

He has 14 shovels and sand pails in all

Subtract to find the number of pails

14 – 5 = 9

The missing addend is 9

So, 9 + 5 = 14

Therefore, Max have 9 sand pails.

Question 12.

When I am added to 7, the sum is 12. What number am I?

______________

Answer:

+ 7 = 12

Explanation:

When I am added to 7, the sum is 12

Subtract to find the answer

12 – 7 = 5

So, number is 5

5 + 7 = 12.

**Write Math** How do you use subtraction to find a missing addend in an addition problem? Explain.

_________________________

_________________________

_________________________

_________________________

Answer:

In order to obtain the missing addend, all you have to do is simply subtract the given addend from the total to get the missing digit. Missing Number in Addition Example

Example:

Find the Missing Addend 7 + ? = 9 Solution: Since the missing number is after the + sign we use the counting method. Check how many more added to 7 makes the sum 9.

### McGraw Hill My Math Grade 1 Chapter 4 Lesson 8 My Homework Answer Key

**Practice**

**Find the missing addend.**

Question 1.

8 + = 11

11 – 8 =

Answer:

8 + = 11

11 – 8 =

Explanation:

I wrote the missing addend by subtracting

11 – 8 = 3

The missing addend is 3

So, 8 + 3 = 11.

Question 2.

+ 8 = 16

16 – 8 =

Answer:

+ 8 = 16

16 – 8 =

Explanation:

I wrote the missing addend by subtracting

16 – 8 = 8

The missing addend is 8

So, 8 + 8 = 16.

**Find the missing addend.**

Question 3.

9 + = 18

Answer:

9 + = 18

Explanation:

I wrote the missing addend by subtracting

18 – 9 = 9

The missing addend is 9

So, 9 + 9 = 18.

Question 4.

+ 6 = 14

14 – 6 =

Answer:

+ 6 = 14

14 – 6 =

Explanation:

I wrote the missing addend by subtracting

14 – 6 = 8

The missing addend is 8

So, 8 + 6 = 14.

Question 5.

+ 8 = 15

15 – 8 =

Answer:

+ 8 = 15

15 – 8 =

Explanation:

I wrote the missing addend by subtracting

15 – 8 = 7

The missing addend is 7

So, 7 + 8 = 15.

Question 6.

5 + = 11

11 – 5 =

Answer:

5 + = 11

11 – 5 =

Explanation:

I wrote the missing addend by subtracting

11 – 5 = 6

The missing addend is 7

So, 5 + 6 = 11.

Question 7.

There are 16 children flying kites on the beach. Some of the children go home. 9 children are still flying kites. How many children went home?

____ children

Answer:

children

Explanation:

There are 16 children flying kites on the beach

Some of the children go home

9 children are still flying kites

16 – 9 =

I wrote the missing addend by subtracting

16 – 9 = 7

The missing addend is 7

9 + 7 = 16

So, 7 children went home.

**Vocabulary Check**

Question 8.

Circle the number sentence that shows a missing addend.

4 + 8 = 12 7 + = 15

Answer:

Explanation:

7 + 8 = 15 is the sentence that shows a missing addend

So, i drew a circle around the second sentence.

**Math at Home** Ask your child to tell you the subtraction fact that will help him or her find the missing addend in 8 + = 15.

Answer:

8 + = 15

Explanation:

I wrote the missing addend by subtracting

15 – 8 = 7

The missing addend is 7

So, 8 + 7= 15.