We included **HMH Into Math Grade 2 Answer Key PDF** **Module 1 Lesson 1 Use Doubles Facts to Add** to make students experts in learning maths.

## HMH Into Math Grade 2 Module 1 Lesson 1 Answer Key Use Doubles Facts to Add

I Can use doubles facts to find sums for other facts.

**Spark Your Learning**

How can you show the number of runs each team scores? Write an addition fact to show the number of runs scored by both teams.

Answer:

Explanation:

5 + 5 = 10, 10 + 1 = 11

So, 5 + 6 = 11

Both the teams scored 11 runs.

Read the following: The points scored in baseball games are called runs. The blue team scores 5 runs. The red team scores 1 more run than the blue team. How can you show the number of runs each team scores? Write an addition fact that shows the number of runs scored by both teams. Use a doubles fact to help you find the sum.

**Build Understanding**

There are 4 turtles on a log. Then 5 more turtles climb onto the log. How many turtles are on the log now?

A. How can you write an addition fact that shows this problem?

Answer:

4 + 5 = 9

B. How can you use tools and the doubles fact 4 + 4 = 8 to find the sum?

Answer:

C. How can you write the sum and solve the problem?

4 + 5 = ___

There are ___ turtles on the log.

Answer:

4+ 5 = 9

There are 9 turtles on the log now.

**Turn and Talk** What doubles fact could help you find the sum of 3 and 2? Explain.

**Step It Out**

1. Elijah has 9 baseball stickers and 8 football stickers. How many stickers does he have?

A. Write an addition fact that shows this problem.

Answer:

9 + 8 = 17

B. Write a doubles fact that can help you solve this problem.

___ + ___ = ____

Answer:

8 + 8 = 16

C. Decide if you need I more or I less than the doubles sum.

I _____

Answer:

I need to add 1 more to the doubles sum.

D. Write the addition fact for the problem. Then solve.

___ + ___ = ____ Elijah has ___ stickers.

Answer:

9 + 8 = 17

Elijah has 17 stickers.

**Check Understanding Math Board**

Question 1.

There are 6 tomato plants in the first row of a garden. There are 7 tomato plants in the second row. How many tomato plants are there? Write an addition fact that shows the problem. Then write a doubles fact that can help you solve the problem. Solve.

addition fact: __+ ___ =

doubles fact: _____ + _____ = _____

____ tomato plants

Answer:

13 tomato plants

Explanation:

Addition fact: 6 + 7 = 13

Doubles fact: 6 + 6 = 12

There are 13 tomato plants in the garden in all.

**On Your Own**

Question 2.

**Reason** There are 8 birds on flowers at the park. Then 7 more birds land on flowers. How many birds are on flowers now? What doubles fact can help you solve the problem? Explain.

Answer:

8 + 7 = 15

Explanation:

8 + 7 = 15

Double facts: 7 + 7 = 14 or 8 + 8 = 16

The above double facts help us to solve the problem

There are 15 birds on the flowers at the park now.

**Use Repeated Reasoning** Write a doubles fact that can help you find the sum. Write the sum.

Question 3.

4 + 3 = ____

doubles fact: ___ + ___ = ____

Answer:

4 + 3 = 7

Doubles fact: 4 + 4 = 8

Explanation:

The sum of 4 and 3 is 7.

Question 4.

6 + 5 = ___

doubles fact: ___ + ___ = ____

Answer:

6 + 5 = 11

Doubles fact: 6 + 6 = 12

Explanation:

The sum of 6 and 5 is 11.

Question 5.

5 + 4 = ___

doubles fact: ___ + ___ = ____

Answer:

5 + 4 = 9

Doubles fact: 5 + 5 = 10

Explanation:

The sum of 5 and 4 is 9.

**I’m in a Learning Mindset!**

How will understanding doubles facts help me?

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