All the solutions provided inÂ **McGraw Hill My Math Grade 1 Answer Key PDF Chapter 3 Lesson 5 Use Near Doubles to Add **will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 1 Answer Key Chapter 3 Lesson 5 Use Near Doubles to Add

**Explore and Explain**

Answer:

Explanation:

I used to model the problem

I shown the doubles fact 3 + 3

Then i took away 1 cube

3 + 2 = 5

So, the addition number sentence is 3 + 2 = 5.

**Teacher Directions:** Use to model. Show the doubles fact 3 + 3 on the billboard. Add or take away one cube from one of the groups of cubes. Trace the cubes. Write the addition number sentence.

**See and Show**

You can use near doubles facts to find a sum. If you know 5 + 5 = 10, you can find 5 + 6 and 5 + 4.

**Use to model. Write the addition number sentence.**

Question 1.

Answer:

Explanation:

The doubles fact is 4 + 4 = 8

The doubles plus 1 is 4 + 5 = 9.

Question 2.

Answer:

Explanation:

The doubles fact is 3 + 3 = 6

The doubles minus 1 is 3 + 2 = 5.

**Talk Math** How do doubles facts help you learn near doubles facts?

Answer:

The doubles facts helps us to learn the near doubles either by adding or subtracting 1 from the doubles.

**On My Own**

**Use to model. Find each sum.**

Question 3.

2 + 2 = ____

2 + 3 = ____

Answer:

Explanation:

The doubles fact isÂ 2 + 2 = 4

The doubles plus 1 is 2 + 3 = 5.

Question 4.

3 + 3 = ____

3 + 2 = ____

Answer:

Explanation:

The doubles fact is 3 + 3 = 6

The doubles minus 1 is 3 + 2 = 5.

Question 5.

8 + 7 = ____

Answer:

Explanation:

The doubles fact is 7 + 7 = 14

I drew doubles plus 1

The addition number sentence is 8 + 7 = 15.

Question 6.

7 + 7 = ____

Answer:

Explanation:

The doubles fact is 7 + 7 = 14.

Question 7.

6 + 6 = ____

Answer:

Explanation:

The doubles fact is 6 + 6 = 12.

Question 8.

6 + 5 = ____

Answer:

Explanation:

The doubles fact is 5 + 5 = 10

Doubles plus 1 is 6 + 5 = 11.

Question 9.

Answer:

Explanation:

7 + 7 = 14

7 + 6 = 13

So, the sum of 7 and 6 is 13.

Question 10.

Answer:

Explanation:

7 + 7 = 14

7 + 8 = 15

So, the sum of 7 and 8 is 15.

Question 11.

Answer:

Explanation:

4 + 4 = 8

4 + 3 = 7

So, the sum of 4 and 3 is 7.

Question 12.

Answer:

Explanation:

5 + 5 = 10

5 + 4 = 9

So, the sum of 5 and 4 is 9.

Question 13.

Answer:

Explanation:

5 + 5 = 10

So, the sum of 5 and 5 is 10.

Question 14.

Answer:

Explanation:

5 + 5 = 10

5 + 6 = 11

So, the sum of 5 and 6 is 11.

Question 15.

Answer:

Explanation:

The sum of 7 and 3 is 10.

Question 16.

Answer:

Explanation:

The sum of 7 and 5 is 12.

Question 17.

Answer:

Explanation:

The sum of 7 and 4 is 11.

**Problem Solving**

**Solve. Write the doubles foot that helped you solve the problem.**

Question 18.

Tyra sees 5 beetles. Sara sees 6 beetles. How many beetles do they see in all?

____ beetles

____ + ___ = ____

Answer:

Explanation:

Tyra sees 5 beetles

Sara sees 6 beetles

The doubles fact is 5 + 5 = 10

Doubles fact plus 1 is 5 + 6 = 11

So, they saw 11 beetles in all.

Question 19.

Adam has 9 red flowers and 8 purple flowers. How many flowers does he have in all?

_____ flowers

____ + ___ = ____

Answer:

Explanation:

Adam has 9 red flowers

8 purple flowers

Doubles fact is 9 + 9 = 18

Doubles fact minus 1 is 9 + 8 = 17

So, Adam ha s17 flowers in all.

**HOT Problem** Devon has 6 pets. Maya has 7 pets. The answer is 13 pets. What is the question?

________________________

________________________

________________________

Answer:

Devon has 6 pets. Maya has 7 pets. How many pets do they have in all?

### McGraw Hill My Math Grade 1 Chapter 3 Lesson 5 My Homework Answer Key

**Practice**

**Find each sum.**

Question 1.

4 + 4 = _____

4 + 5 = ____

Answer:

Explanation:

The doubles fact is 4 + 4 = 8

The doubles plus 1 is 4 + 5 = 9.

Question 2.

8 + 8 = ____

8 + 7 = ____

Answer:

Explanation:

The doubles fact is 8 + 8 = 7

The doubles minus 1 is 8 + 7 = 15.

Question 3.

6 + 5 = ____

Answer:

Explanation:

The doubles fact is 5 + 5 = 10

The doubles plus 1 is 6 + 5 = 11.

Question 4.

6 + 6 = ____

Answer:

Explanation:

The doubles fact is 6 + 6 = 12.

Question 5.

Answer:

Explanation:

7 + 7 = 14

7 + 6 = 15

So, the sum of 7 and 6 is 13.

Question 6.

Answer:

Explanation:

The doubles fact is 7 + 7 = 14.

Question 7.

Answer:

Explanation:

7 + 7 = 14

7 + 8 = 15

So, the sum of 7 and 8 is 15.

**Solve. Write the doubles fact that helped you solve the problem.**

Question 8.

Paul is a dog walker. He walks 7 small dogs. He walks 6 large dogs. How many dogs does he walk in all?

____ dogs

____ + ____ = ____

Answer:

Explanation:

Paul is a dog walker

He walks 7 small dogs

He walks 6 large dogs

Doubles fact is 7 + 7 = 14

Doubles minus 1 is 7 + 6 = 13

So, Paul walks 13 dogs in all.

Question 9.

There are 9 girls and 8 boys in Mariaâ€™s class who walk to school. How many children in her class walk to school in all?

____ children

____ + ____ = ____

Answer:

Explanation:

There are 9 girls and 8 boys in Mariaâ€™s class who walk to school

The doubles fact is 8 + 8= 16

The doubles plus 1 is 9 + 8 = 17

So, 17 children walk to school.

**Vocabulary Check**

**Circle the missing word.**

doubles plus 1 doubles minus 1

Question 10.

If you know that 8 + 8 = 16, then you can use ____ to find 8 + 7.

Answer:

If you know that 8 + 8 = 16, then you can use doubles minus 1 to find 8 + 7.

**Math at Home** Give your child an addition problem such as 4 + 5 or 3 + 4. Have your child give you the doubles fact that will help him or her find the sum.