WaffleMath LogoWaffleMath
K12345678HSBrowse standardsBrowse worksheetsTeacher resources

Mental Math Worksheet

Recommended for 1st Grade — 5th Grade

More Mental Math GamesAll Worksheets
New Worksheet

Mental Math Worksheet

Name: ____________________Date: ____________

Instructions: Using mental strategies like making ten, doubling, and compensation to compute quickly.

20 problems

  1. 45 − 10 = ______
  2. 63 − 10 = ______
  3. 39 + 20 = ______
  4. 89 − 10 = ______
  5. 86 + 10 = ______
  6. 16 + 20 = ______
  7. 36 + 20 = ______
  8. 81 − 10 = ______
  9. 68 + 20 = ______
  10. 30 + 20 = ______
  11. 21 + 10 = ______
  12. 1 × 10 = ______
  13. 65 + 10 = ______
  14. 54 + 20 = ______
  15. 51 + 10 = ______
  16. 62 + 20 = ______
  17. 67 + 10 = ______
  18. 4 × 10 = ______
  19. 38 + 20 = ______
  20. 78 + 20 = ______
Mental Math Worksheet — Free Printable with Answer Key | WaffleMath