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Mental math worksheet

Advanced · 24 problems with a full answer key. Free to print, free to copy, and nothing to sign up for.

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Mental math practice

Four strategies, bigger · advanced
Name Date

Show your working. The answer key is on the next page.

  1. 1. 38 + 38 =
  2. 2. 60 + 61 =
  3. 3. 90 + 90 =
  4. 4. 53 + 97 =
  5. 5. 91 − 28 =
  6. 6. 35 + 35 =
  7. 7. 74 + 72 =
  8. 8. 62 + 58 =
  9. 9. 58 + 92 =
  10. 10. 52 + 88 =
  11. 11. 69 + 28 =
  12. 12. 97 + 97 =
  13. 13. 92 + 48 =
  14. 14. 63 − 39 =
  15. 15. 90 − 69 =
  16. 16. 58 − 28 =
  17. 17. 75 + 75 =
  18. 18. 71 + 73 =
  19. 19. 60 + 90 =
  20. 20. 71 + 71 =
  21. 21. 29 + 29 =
  22. 22. 51 + 79 =
  23. 23. 46 + 46 =
  24. 24. 41 + 42 =
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Mental math practice

Four strategies, bigger · advanced
Name Date
Answer key
  1. 1. 38 + 38 = 76
  2. 2. 60 + 61 = 121
  3. 3. 90 + 90 = 180
  4. 4. 53 + 97 = 150
  5. 5. 91 − 28 = 63
  6. 6. 35 + 35 = 70
  7. 7. 74 + 72 = 146
  8. 8. 62 + 58 = 120
  9. 9. 58 + 92 = 150
  10. 10. 52 + 88 = 140
  11. 11. 69 + 28 = 97
  12. 12. 97 + 97 = 194
  13. 13. 92 + 48 = 140
  14. 14. 63 − 39 = 24
  15. 15. 90 − 69 = 21
  16. 16. 58 − 28 = 30
  17. 17. 75 + 75 = 150
  18. 18. 71 + 73 = 144
  19. 19. 60 + 90 = 150
  20. 20. 71 + 71 = 142
  21. 21. 29 + 29 = 58
  22. 22. 51 + 79 = 130
  23. 23. 46 + 46 = 92
  24. 24. 41 + 42 = 83
mathgamescentral.com — free to print, free to copy, no login.

Standards this covers

  • 1.OA.B.3
  • 1.OA.C.6
  • 2.NBT.B.5
  • 2.OA.B.2
  • 3.NBT.A.2

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