## Envision Math 2nd Grade Textbook Answer Key Topic 2.1 Adding 0, 1, 2

**Addition Strategies**

**Review What You Know**

Write an addition sentence to answer the question. Bill has 4 baseballs. Tess has 4 baseballs. How many baseballs do they have altogether?

__ + __ = __

Write the numbers that show ways to make 10.

Question 1.

__ + ___ = ____

Answer:

Question 2.

__ + ___ = ____

Answer:

**Home-School Connection**

Dear Family,

Today my class started Topic 2, Addition Strategies. I will learn different ways to add numbers. Here are some of the new math words I will be learning and some things we can do to help me with my math.

Love,

_________

**Book to Read**

Reading math stories reinforces concepts. Look for this title in your local library:

Animals on Board

By Stuart J. Murphy

(HarperTrophy, 1998)

**Home Activity**

Gather 11 small items, such as pennies or buttons. Use the items to help your child practice showing 0, 1, or 2 more. For example, show a group of 7 pennies and ask your child to show 1 more. Your child then adds 1 penny to the group and says, “Now there are 8 pennies.” Continue with other small items.

**My New Math Words**

doubles

A doubles fact has two addends that are the same.

near doubles

An addition fact with near doubles has an addend that is one more than the other addend.

addend

The numbers that are added are called addends.

**Make Tens**

Number of players: 2

How to Play

1. Take turns. Spin the spinner.

2. Add the number you spun and a number on a rocket to make 10.

3. Use a counter to cover the number on the rocket.

4. Play until all numbers on the rockets are covered.

What You Need

16 counters

1 paper clip

1 pencil

Adding 0 , 1 , 2

Question 1.

___ + ___ = ___

Answer:

Question 2.

___ + ___ = ___

Answer:

Question 3.

___ + ___ = ___

Answer:

Question 4.

___ + ___ = ___

Answer:

**Home Connection** Your child added 0, 1, and 2 to a number to find a sum.

**Home Activity** Pose addition exercises to your child involving adding 0, 1, or 2, for example 3 + 0, 4 + 1, and 6 + 2. Have your child find each sum.

NS 2.1 , Grade 1 Know the addition facts (sums to 20) and the corresponding subtraction facts and commit them to memory. Also MR 1.2, AF 1.2.

**Guided Practice**

Circle the 0, 1, or 2. Then add.

Question 1.

4 + 0 = __4__

Answer:

Question 2

3 + 1 = ___

Answer:

Question 3.

5 + 2 = ___

Answer:

Question 4.

2 + 3 =__

Answer:

Question 5.

4 + 1 = __

Answer:

Question 6.

7 + 1 = ___

Question 7.

Answer:

Question 8.

Answer:

Question 9.

Answer:

Question 10.

Answer:

Do you understand? Pick a number less than ten. What numbers are 2 more, 1 more, and 0 more than your number?

Independent Practice

Circle the 0, 1, or 2.

Then add.

Question 11.

Answer:

Question 12.

Answer:

Question 13.

Answer:

Question 14.

Answer:

Question 15.

8 + 2 = __

Answer:

Question 16.

2 + 6 = ___

Answer:

Question 17.

9 + 2 = __

Answer:

Question 18.

5 + 2 = ___

Answer:

Question 19.

9 + 0 = ___

Answer:

Question 20.

8 + 0 = ___

Answer:

**Algebra**

Write the missing number.

Question 21.

+ 4 = 4

Answer:

Question 22.

9 + = 10

Answer:

**Problem Solving**

Solve the problems below

Question 23.

Julia had 7 paper dolls. Then she made 2 more dolls.

How many paper dolls does Julia have in all?

Answer:

Question 24.

Tony has 9 colored pencils. Amy has 2 colored pencils. How many colored pencils do Tony and Amy have in all?

Mark the addition sentence that shows this problem.

Answer:

Question 25.

Journal Draw a number story using 0, 1 more, or 2 more. Write an addition sentence for your story.

Answer: