Grade 2 - Math

Grade 2 Subtraction Within 100 Worksheet

6 printable versions - Challenge Me - About 7 minutes each

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Subtraction Within 100

Grade 2 - Math - Challenge Me

Worksheet 1

  1. 79 - 5 = ____

  2. Start at 92 and count back 84. What number is left?

    A math model showing the known values from the question and leaving the requested value to solve.A number line labelled from 8 to 92, marked every 9.8172635445362718089

  3. A bin had 72 blocks. Students used 17. How many blocks are left?

    A math model showing the known values from the question and leaving the requested value to solve.A bar model. The top bar is the whole and the bars below it are the 2 parts. Empty boxes mark the values to be found.7217

  4. Which equation matches taking 81 from 97?

  5. In 29 - 21, what number can you add to 21 to reach 29?

  6. 56 - 25 = ____

  7. Start at 66 and count back 43. What number is left?

    A math model showing the known values from the question and leaving the requested value to solve.A number line labelled from 23 to 66, marked every 5.232833384348535863

  8. A bin had 45 blocks. Students used 18. How many blocks are left?

    A math model showing the known values from the question and leaving the requested value to solve.A bar model. The top bar is the whole and the bars below it are the 2 parts. Empty boxes mark the values to be found.4518

  9. Which equation matches taking 31 from 50?

  10. In 84 - 54, what number can you add to 54 to reach 84?

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About this worksheet

Subtraction within one hundred is often harder than addition because students must keep track of what is removed and what remains. Regrouping makes the task even more demanding: a child may know they need more ones but forget that borrowing from the tens changes the tens digit. This worksheet keeps all numbers within one hundred while asking subtraction in several ways. Students solve direct equations, word problems, number-line questions, part-whole models, and missing-addend forms. Seeing the same relationship from different angles helps children understand subtraction as a relationship between a whole and two parts, not just as counting backward. Watch for answers that are one too high or one too low after crossing a ten. A quick addition check can confirm the difference.

What your child will learn

  • Subtract within 100
  • Use part-whole models to find a missing part
  • Connect subtraction to missing-addend thinking
  • Solve take-away word problems

Worked example

For 72 - 38, trade one ten for ten ones. Then 12 - 8 = 4 and 6 tens - 3 tens = 3 tens, so the answer is 34.

Common mistake

Forgetting that regrouping changes the tens digit before subtracting the tens.

Helpful hint

Ask which number is the whole and which part is being removed.

Two-Digit AdditionTwo-Digit Subtraction

Questions parents ask

What is the most common mistake with subtraction within 100?
Forgetting that regrouping changes the tens digit before subtracting the tens.
How can I help my child with subtraction within 100?
Ask which number is the whole and which part is being removed.
Are these 2nd grade math worksheets free to print?
Yes. All 6 printable versions on this page are free to download and print, with no account needed.

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