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Math Grade 2-3 Answer Key

Mixed Operations: Addition, Subtraction, and Multiplication

Practice choosing the right operation and solving carefully

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Mixed Operations: Addition, Subtraction, and Multiplication

Practice choosing the right operation and solving carefully

Math - Grade 2-3

Instructions: Read each problem carefully. Decide whether to add, subtract, or multiply. Show your work in the space provided.
  1. 1

    Solve: 24 + 18 = ?

    24 + 18 = 42. You can add 20 + 10 = 30 and 4 + 8 = 12, then 30 + 12 = 42.
  2. 2

    Solve: 57 - 29 = ?

    Subtract 30 first, then fix the extra 1 you subtracted.

    57 - 29 = 28. You can subtract 30 from 57 to get 27, then add 1 back to get 28.
  3. 3

    Solve: 6 x 4 = ?

    6 x 4 = 24. This means 6 groups of 4, which makes 24 in all.
  4. 4

    Maya has 15 stickers. Her friend gives her 12 more stickers. How many stickers does Maya have now?

    The number of stickers gets bigger, so use addition.

    Maya has 27 stickers now because 15 + 12 = 27.
  5. 5

    There are 43 apples in a basket. 17 apples are sold. How many apples are left?

    There are 26 apples left because 43 - 17 = 26.
  6. 6

    A table has 4 legs. How many legs do 5 tables have in all?

    Think of 5 equal groups of 4 legs.

    Five tables have 20 legs in all because 5 x 4 = 20.
  7. 7

    Solve: 38 + 27 = ?

    38 + 27 = 65. You can add 30 + 20 = 50 and 8 + 7 = 15, then 50 + 15 = 65.
  8. 8

    Solve: 72 - 36 = ?

    Subtract the tens first, then subtract the ones.

    72 - 36 = 36. You can break 36 into 30 and 6, then subtract 72 - 30 = 42 and 42 - 6 = 36.
  9. 9

    There are 3 rows of chairs with 7 chairs in each row. How many chairs are there in all?

    There are 21 chairs in all because 3 x 7 = 21.
  10. 10

    A library had 64 books on a shelf. Students checked out 18 books. Then the librarian added 9 new books. How many books are on the shelf now?

    Do the steps in the order they happen in the story.

    There are 55 books on the shelf now. First, 64 - 18 = 46, and then 46 + 9 = 55.
  11. 11

    Solve: 8 x 3 = ? Then write an addition sentence that matches it.

    8 x 3 = 24. A matching addition sentence is 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 = 24.
  12. 12

    Lena has 28 crayons. She gives 9 crayons to her brother and 6 crayons to her sister. How many crayons does Lena have left?

    First find how many crayons she gives away altogether.

    Lena has 13 crayons left. She gives away 9 + 6 = 15 crayons, and 28 - 15 = 13.
  13. 13

    There are 9 bags. Each bag has 2 oranges. How many oranges are there in all?

    There are 18 oranges in all because 9 x 2 = 18.
  14. 14

    Choose the operation and solve: Sam had 35 toy cars. He bought 14 more toy cars. Did you add, subtract, or multiply?

    Look for words that show the amount is increasing.

    You add because Sam gets more toy cars. 35 + 14 = 49, so Sam has 49 toy cars.
  15. 15

    A garden has 4 rows of flowers with 6 flowers in each row. Then 5 flowers are picked. How many flowers are left?

    First find the total number of flowers in the rows, then subtract the flowers picked.

    There are 19 flowers left. First, 4 x 6 = 24 flowers, and then 24 - 5 = 19.
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