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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 785 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.58 + 12 + 79 + 74 =
  2. 2.37 + 57 + 26 + 75 =
  3. 3.57 + 22 + 84 + 59 =
  4. 4.42 + 16 + 48 + 36 =
  5. 5.52 + 26 + 58 + 18 =
  6. 6.88 + 17 + 41 + 17 =
  7. 7.70 + 15 + 55 + 22 =
  8. 8.73 + 36 + 50 + 46 =
  9. 9.38 + 36 + 38 + 40 =
  10. 10.87 + 89 + 50 + 19 =
  11. 11.50 + 45 + 13 + 88 =
  12. 12.65 + 83 + 70 + 27 =
  13. 13.77 + 27 + 87 + 68 =
  14. 14.18 + 65 + 59 + 82 =
  15. 15.49 + 75 + 41 + 30 =
  16. 16.71 + 63 + 47 + 42 =
  17. 17.31 + 50 + 72 + 75 =
  18. 18.89 + 43 + 59 + 31 =
  19. 19.25 + 45 + 88 + 72 =
  20. 20.46 + 61 + 61 + 77 =
  21. 21.81 + 85 + 51 + 14 =
  22. 22.53 + 28 + 16 + 35 =
  23. 23.47 + 86 + 18 + 22 =
  24. 24.53 + 29 + 79 + 74 =
  25. 25.30 + 47 + 53 + 11 =
  26. 26.82 + 24 + 25 + 88 =
  27. 27.20 + 86 + 43 + 56 =
  28. 28.44 + 23 + 45 + 38 =
  29. 29.16 + 59 + 35 + 70 =
  30. 30.30 + 48 + 45 + 59 =
  31. 31.13 + 15 + 18 + 34 =
  32. 32.54 + 40 + 29 + 81 =
  33. 33.52 + 82 + 11 + 53 =
  34. 34.46 + 75 + 71 + 54 =
  35. 35.19 + 53 + 82 + 50 =
  36. 36.46 + 17 + 19 + 60 =
  37. 37.25 + 42 + 76 + 43 =
  38. 38.19 + 31 + 32 + 81 =
  39. 39.57 + 83 + 49 + 62 =
  40. 40.32 + 32 + 26 + 57 =

Answer key

  1. 223
  2. 195
  3. 222
  4. 142
  5. 154
  6. 163
  7. 162
  8. 205
  9. 152
  10. 245
  11. 196
  12. 245
  13. 259
  14. 224
  15. 195
  16. 223
  17. 228
  18. 222
  19. 230
  20. 245
  21. 231
  22. 132
  23. 173
  24. 235
  25. 141
  26. 219
  27. 205
  28. 150
  29. 180
  30. 182
  31. 80
  32. 204
  33. 198
  34. 246
  35. 204
  36. 142
  37. 186
  38. 163
  39. 251
  40. 147

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