## Envision Math 2nd Grade Textbook Answer Key Topic 1.1 Writing Addition Number Sentences

**Review What You Know**

Question 1.

Write the numbers in order from least to greatest.

Answer:

Question 2.

There are 7 birds on a fence 2 fly away. How many birds are left?

__ birds

Question 3.

Write the addition sentence to solve the problem. Kate draws 4 big stars. Then she draws 4 small stars. How many stars does Kate draw?

__ + __ = __

**Home-School Connection**

Dear Family,

Today my class started Topic 1, Understanding Addition and Subtraction I will learn to write number sentences and solve story problems using addition and subtraction. 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:

Rooster’s Off to See the World By Eric Carle

(First Aladdin Paperbacks, 1999)

**Home Activity**

Collect 8 small objects such as buttons or crayons. Help your child use the objects to create math story problems involving addition or subtraction. For example, “I have 3 crayons, and here are 5 more. How many crayons do I have in all? I have 8 crayons in all.”

**My New Math Words**

**sum**

When you add numbers together, you find the sum.

3 + 4 = 7

more

Use more to talk about having a greater amount.

8 – 5 = 3

fewer

Use fewer to talk about having a lesser amount

6-4 = 2

**Addition Stories**

Number of players: 2

How to Play

1. Take turns. Toss the number cubes.

2. Add the two numbers.

3. Cover the toy that shows the sum. If a toy is covered already, toss the number cubes to find a different sum.

4. Play until each toy is covered.

**Writing Additon**

**Number Sentences**

Question 1.

__ and __ is __ in all.

Answer:

Question 2.

__ and __ is __ in all.

Home Connection Your child used cubes to model addition and then wrote an addition sentence.

Home Activity Use two groups of small objects, such as coins or buttons. Have your child add to tell you the total. Encourage your child to say the addition sentence, for example, “6 plus 2 equals 8.”

AF 1.3 Solve addition and subtraction problems by using data from simple charts, picture graphs, and number sentences. Also AF 1.2.

**Guided Practice**

Write an addition sentence for the picture.

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

Question 4.

Answer:

Do you understand? You have some red cubes and some blue cubes. How can you show how many cubes in all?

**Independent Practice**

Write an addition sentence for the picture.

Question 5.

Answer:

Question 6.

Answer:

Question 7.

Answer:

Algebra Fill in the missing part, then complete the addition sentence.

Question 8.

Answer:

**Problem Solving**

Use the box to solve the problem. Then write the addition sentence.

Question 9.

Pete has 5 red apples and 5 green apples. He also has 3 bananas. How many apples does Pete have in all?

__ + __ = __

__ apples

Answer:

Question 10.

Sally has 8 pink flowers. She also has 5 blue flowers. Which picture shows how many flowers Sally has?

Answer:

Question 11.

Journal Draw some green shapes and blue shapes. Write an addition sentence to tell how many shapes you drew in all.

__ + __ = ___

Answer: