MyMathKidK-8 Curriculum

Grade 2 Mental Math Worksheets

Master mental math step by step, from basic concepts to advanced problem solving

Common Core: 2.NBT

Watch & Learn

Learning Path

Start with Lesson 1 and work your way through!

1

Make 10 Strategy Review

Beginner

Review make 10 strategy

Review make 10Build fluency
2

Compensation Strategy

Easy

Learn compensation for mental math

Round to friendly numbersAdjust after adding
3

Break Apart Strategy

Easy

Break numbers into parts

Break into tens and onesAdd parts separately
4

Friendly Numbers

Easy

Use friendly numbers

Identify friendly numbersUse for easier calculation
5

Mixed Mental Math

Easy

Practice all strategies

Choose best strategyApply flexibly

How to solve Grade 2 mental math problems

Real problems from these worksheets, solved one step at a time — the same explanations your child sees when practicing online.

  1. Example 1

    6 + 6 = ?

    1. 6 needs 4 more to make 10.
    2. Split 6 into 4 and 2.
    3. 6 + 4 = 10.
    4. 10 + 2 = 12.

    Answer: 12

  2. Example 2

    45 + 17 = ?

    1. Break apart both numbers by place value.
    2. 45 = 40 + 5
    3. 17 = 10 + 7
    4. Add the tens: 40 + 10 = 50
    5. Add the ones: 5 + 7 = 12
    6. 12 ones = 1 ten and 2 ones (regrouping)
    7. Combine: 50 + 12 = 62

    Answer: 62

  3. Example 3

    19 + 25 = ?

    1. Break apart both numbers by place value.
    2. 19 = 10 + 9
    3. 25 = 20 + 5
    4. Add the tens: 10 + 20 = 30
    5. Add the ones: 9 + 5 = 14
    6. 14 ones = 1 ten and 4 ones (regrouping)
    7. Combine: 30 + 14 = 44

    Answer: 44

Frequently Asked Questions

Are these Grade 2 Mental Math worksheets free?
All printable Mental Math worksheets on MyMathKid are free to download and print. Answer keys are a premium feature available with a subscription.
How many Mental Math worksheets are available for Grade 2?
There are 5 progressive Mental Math lessons with worksheets for Grade 2, covering skills from foundational concepts to advanced problem solving.
Are these Mental Math worksheets aligned to Common Core?
Yes — Grade 2 Mental Math aligns with Common Core 2.NBT (Number & Operations in Base Ten).
What will my child practice with these Mental Math worksheets?
Your child will practice: Make 10 Strategy Review, Compensation Strategy, Break Apart Strategy, Friendly Numbers, and more.