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Math Grade 2-3 Answer Key

Math: Subtraction within 100

Practice subtracting two-digit numbers within 100

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Math: Subtraction within 100

Practice subtracting two-digit numbers within 100

Math - Grade 2-3

Instructions: Read each problem carefully. Solve each subtraction problem and show your work if needed.
  1. 1

    Solve: 54 - 21

    Subtract the tens and ones separately.

    54 - 21 = 33.
  2. 2

    Solve: 68 - 35

    68 - 35 = 33.
  3. 3

    Solve: 72 - 40

    Subtract 4 tens from 7 tens.

    72 - 40 = 32.
  4. 4

    Solve: 93 - 51

    93 - 51 = 42.
  5. 5

    Solve: 80 - 27

    You may need to regroup from the tens place.

    80 - 27 = 53.
  6. 6

    Solve: 61 - 19

    61 - 19 = 42.
  7. 7

    Solve: 45 - 18

    First subtract 10, then subtract 8 more.

    45 - 18 = 27.
  8. 8

    Solve: 100 - 46

    100 - 46 = 54.
  9. 9

    A student had 77 stickers and gave away 25 stickers. How many stickers are left?

    Find how many remain after taking away 25.

    The student has 52 stickers left because 77 - 25 = 52.
  10. 10

    There were 64 birds in a park. 32 birds flew away. How many birds stayed in the park?

    32 birds stayed in the park because 64 - 32 = 32.
  11. 11

    Solve: 57 - 29

    Regroup to subtract the ones place.

    57 - 29 = 28.
  12. 12

    Solve: 84 - 16

    84 - 16 = 68.
  13. 13

    Mia read 90 pages of a book. She has 38 pages left to read. How many pages has she already read if the book has 90 pages and 38 are left?

    Subtract the pages left from the total pages.

    Mia has already read 52 pages because 90 - 38 = 52.
  14. 14

    A box held 73 crayons. 14 crayons were used. How many crayons are still in the box?

    There are 59 crayons still in the box because 73 - 14 = 59.
  15. 15

    Solve: 66 - 48

    Regroup before subtracting the ones.

    66 - 48 = 18.
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