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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 687 · 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. 1.78 + 23 + 61 + 29 =
  2. 2.71 + 62 + 12 + 33 =
  3. 3.17 + 49 + 17 + 24 =
  4. 4.39 + 83 + 21 + 53 =
  5. 5.14 + 53 + 62 + 71 =
  6. 6.40 + 74 + 12 + 84 =
  7. 7.58 + 11 + 70 + 69 =
  8. 8.65 + 50 + 25 + 45 =
  9. 9.35 + 20 + 42 + 32 =
  10. 10.32 + 30 + 61 + 58 =
  11. 11.40 + 19 + 60 + 17 =
  12. 12.39 + 27 + 72 + 77 =
  13. 13.55 + 23 + 74 + 84 =
  14. 14.32 + 80 + 56 + 32 =
  15. 15.55 + 29 + 72 + 44 =
  16. 16.22 + 69 + 16 + 11 =
  17. 17.62 + 48 + 84 + 29 =
  18. 18.70 + 77 + 49 + 65 =
  19. 19.43 + 41 + 87 + 62 =
  20. 20.25 + 12 + 53 + 52 =
  21. 21.19 + 76 + 38 + 19 =
  22. 22.15 + 11 + 21 + 16 =
  23. 23.18 + 75 + 87 + 54 =
  24. 24.68 + 75 + 33 + 20 =
  25. 25.66 + 37 + 39 + 46 =
  26. 26.46 + 35 + 14 + 80 =
  27. 27.11 + 64 + 63 + 61 =
  28. 28.63 + 45 + 35 + 48 =
  29. 29.74 + 79 + 23 + 18 =
  30. 30.71 + 67 + 49 + 28 =
  31. 31.86 + 61 + 72 + 43 =
  32. 32.78 + 81 + 11 + 24 =
  33. 33.86 + 52 + 48 + 36 =
  34. 34.60 + 70 + 83 + 14 =
  35. 35.79 + 48 + 34 + 16 =
  36. 36.23 + 46 + 71 + 69 =
  37. 37.37 + 57 + 25 + 14 =
  38. 38.14 + 61 + 66 + 84 =
  39. 39.88 + 63 + 30 + 40 =
  40. 40.65 + 32 + 12 + 40 =

Answer key

  1. 191
  2. 178
  3. 107
  4. 196
  5. 200
  6. 210
  7. 208
  8. 185
  9. 129
  10. 181
  11. 136
  12. 215
  13. 236
  14. 200
  15. 200
  16. 118
  17. 223
  18. 261
  19. 233
  20. 142
  21. 152
  22. 63
  23. 234
  24. 196
  25. 188
  26. 175
  27. 199
  28. 191
  29. 194
  30. 215
  31. 262
  32. 194
  33. 222
  34. 227
  35. 177
  36. 209
  37. 133
  38. 225
  39. 221
  40. 149

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