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. 71 − 10 = ______
  2. 50 + 20 = ______
  3. 65 + 20 = ______
  4. 78 + 20 = ______
  5. 55 + 20 = ______
  6. 3 × 10 = ______
  7. 7 × 10 = ______
  8. 9 × 10 = ______
  9. 5 × 10 = ______
  10. 17 + 20 = ______
  11. 43 + 10 = ______
  12. 24 + 10 = ______
  13. 39 + 10 = ______
  14. 59 + 20 = ______
  15. 89 − 10 = ______
  16. 84 − 10 = ______
  17. 31 − 10 = ______
  18. 27 + 20 = ______
  19. 6 × 10 = ______
  20. 30 + 20 = ______
Mental Math Worksheet — Free Printable with Answer Key | WaffleMath