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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 67 · 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. 1.70 + 53 + 66 + 42 =
  2. 2.88 + 45 + 88 + 37 =
  3. 3.28 + 78 + 31 + 76 =
  4. 4.20 + 15 + 29 + 22 =
  5. 5.46 + 17 + 58 + 26 =
  6. 6.61 + 79 + 60 + 13 =
  7. 7.78 + 14 + 29 + 54 =
  8. 8.34 + 76 + 49 + 49 =
  9. 9.25 + 35 + 77 + 53 =
  10. 10.37 + 20 + 69 + 65 =
  11. 11.32 + 30 + 68 + 21 =
  12. 12.68 + 67 + 48 + 35 =
  13. 13.67 + 15 + 35 + 18 =
  14. 14.35 + 58 + 72 + 60 =
  15. 15.62 + 35 + 88 + 54 =
  16. 16.47 + 59 + 20 + 17 =
  17. 17.74 + 73 + 38 + 73 =
  18. 18.18 + 58 + 11 + 79 =
  19. 19.16 + 64 + 54 + 60 =
  20. 20.20 + 18 + 17 + 36 =
  21. 21.85 + 70 + 72 + 89 =
  22. 22.52 + 27 + 14 + 71 =
  23. 23.19 + 47 + 89 + 35 =
  24. 24.58 + 61 + 49 + 26 =
  25. 25.69 + 52 + 81 + 21 =
  26. 26.38 + 29 + 83 + 27 =
  27. 27.82 + 16 + 27 + 70 =
  28. 28.52 + 51 + 66 + 22 =
  29. 29.11 + 41 + 88 + 21 =
  30. 30.52 + 26 + 76 + 65 =
  31. 31.47 + 66 + 79 + 67 =
  32. 32.22 + 74 + 12 + 22 =
  33. 33.26 + 75 + 12 + 85 =
  34. 34.40 + 87 + 79 + 26 =
  35. 35.20 + 25 + 51 + 62 =
  36. 36.27 + 74 + 87 + 18 =
  37. 37.22 + 11 + 33 + 89 =
  38. 38.82 + 11 + 38 + 51 =
  39. 39.81 + 71 + 86 + 72 =
  40. 40.28 + 12 + 46 + 43 =

Answer key

  1. 231
  2. 258
  3. 213
  4. 86
  5. 147
  6. 213
  7. 175
  8. 208
  9. 190
  10. 191
  11. 151
  12. 218
  13. 135
  14. 225
  15. 239
  16. 143
  17. 258
  18. 166
  19. 194
  20. 91
  21. 316
  22. 164
  23. 190
  24. 194
  25. 223
  26. 177
  27. 195
  28. 191
  29. 161
  30. 219
  31. 259
  32. 130
  33. 198
  34. 232
  35. 158
  36. 206
  37. 155
  38. 182
  39. 310
  40. 129

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