## Envision Math 2nd Grade Textbook Answer Key Topic 2.5 Adding Three Numbers

**Adding Three Numbers**

Question 1.

My numbers: ____ , ____ , ____

Answer:

Question 2.

My numbers: ____ , ____ , ____

Answer:

Question 3.

My numbers: ____ , ____ , ____

Answer:

Question 4.

My numbers: ____ , ____ , ____

Answer:

**Home Connection** Your child added three numbers.

**Home Activity** Have your child use pennies or other small objects to show different ways to add 9 + 1 + 4.

Continue by adding three other numbers less than 10.

AF 1.1 Use the commutative and associative rules to simplify mental calculations and to check results.

Also MR 1.0, MR 1.1, MR 2.0.

**Guided Practice**

Find each sum in two different ways.

Circle the numbers you added first.

Then write their sum in the box.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Do you understand? What are two different ways you could add 3 + 4 + 7? Explain.

**Independent Practice**

Write the sum.

Circle the numbers you added first

Question 5.

3 + 8 + 2 =

Answer:

Question 6.

5 + 7 + 5 =

Answer:

Question 7.

9 + 4 + 1 =

Answer:

Question 8.

6 + 5 + 7 = ___

Answer:

Question 9.

Answer:

Question 10.

Answer:

Question 11.

Answer:

Question 12.

Answer:

**Algebra**

Find the missing number

Question 13.

6 + + 3 = 10

Answer:

Question 14.

5 + 5 + = 15

Answer:

**Problem Solving**

Solve the problems below.

Question 15.

There are three kinds of balls. List 3 different ways you can add to find the total number of balls.

_________________

_________________

_________________

Answer:

Question 16.

Josie has 2 baseballs and her brother has 4.

They then got 8 more as a gift.

How many baseballs do they now have in all?

Answer:

Question 17.

Journal Use pictures, numbers, or words to show two different ways to add 4 + 2 + 6. Explain your thinking

Answer: