Grade 2 Mental Math Practice

This worksheet helps second-grade students practice mental math strategies for addition and subtraction within 100.

Grade 2 Math Number SenseMental Math

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Includes

3 Fill in the BlanksMultiple ChoiceShort AnswerTrue / False

Standards

CCSS.MATH.CONTENT.2.OA.B.2CCSS.MATH.CONTENT.2.NBT.B.5

Topics

mental mathgrade 2additionsubtractionnumber sense

8 sections · Free to use · Printable

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Grade 2 Mental Math Practice

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Date:

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Read each question carefully and solve it using mental math. Try not to use paper or a calculator!

Fill in the blank with the correct answer.

1. 10 + 7 =

2. 20 + 5 =

3. 30 + 9 =

4. 15 + 3 =

5. 24 + 6 =

Fill in the blank with the correct answer.

1. 18 - 8 =

2. 25 - 5 =

3. 30 - 7 =

4. 12 - 4 =

5. 40 - 10 =

1. Which strategy would you use to solve 35 + 9 mentally?

Count by ones

Make a ten (35+5=40, 40+4=44)

Draw a picture

Use your fingers

2. Which strategy would you use to solve 50 - 8 mentally?

Count backward by ones

Subtract from a ten (50-10=40, 40+2=42)

Use a calculator

Ask a friend

Solve the following word problems using mental math.

1. Sarah had 12 cookies. She baked 8 more. How many cookies does Sarah have now?

2. Tom had 20 stickers. He gave away 6 stickers. How many stickers does Tom have left?

Use the number line to help you solve the problem.

1. Start at 10. Jump forward 5. Where do you land?

Answer:

2. Start at 20. Jump backward 7. Where do you land?

Answer:

Read each statement and circle True or False.

1. Adding 10 to a number always increases the tens digit by one.

True

False

2. Subtracting a small number is harder than adding it.

True

False