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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 68 · 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. 1.80 + 18 + 62 + 31 =
  2. 2.82 + 83 + 62 + 27 =
  3. 3.86 + 51 + 12 + 63 =
  4. 4.32 + 53 + 83 + 50 =
  5. 5.73 + 40 + 41 + 65 =
  6. 6.85 + 87 + 50 + 25 =
  7. 7.33 + 37 + 62 + 75 =
  8. 8.15 + 80 + 56 + 49 =
  9. 9.13 + 68 + 75 + 86 =
  10. 10.51 + 22 + 43 + 22 =
  11. 11.68 + 23 + 77 + 57 =
  12. 12.35 + 43 + 81 + 12 =
  13. 13.64 + 63 + 82 + 72 =
  14. 14.53 + 75 + 11 + 26 =
  15. 15.78 + 33 + 47 + 86 =
  16. 16.30 + 39 + 62 + 59 =
  17. 17.81 + 77 + 19 + 83 =
  18. 18.63 + 61 + 75 + 32 =
  19. 19.51 + 79 + 22 + 75 =
  20. 20.42 + 11 + 76 + 44 =
  21. 21.85 + 30 + 78 + 35 =
  22. 22.72 + 78 + 76 + 28 =
  23. 23.16 + 33 + 38 + 50 =
  24. 24.57 + 85 + 89 + 46 =
  25. 25.39 + 63 + 47 + 82 =
  26. 26.24 + 72 + 71 + 77 =
  27. 27.15 + 50 + 89 + 67 =
  28. 28.21 + 46 + 24 + 62 =
  29. 29.47 + 88 + 25 + 64 =
  30. 30.55 + 71 + 49 + 30 =
  31. 31.32 + 17 + 33 + 11 =
  32. 32.69 + 61 + 37 + 51 =
  33. 33.32 + 16 + 59 + 45 =
  34. 34.71 + 19 + 49 + 64 =
  35. 35.16 + 81 + 73 + 84 =
  36. 36.32 + 73 + 89 + 32 =
  37. 37.60 + 89 + 74 + 24 =
  38. 38.17 + 54 + 33 + 25 =
  39. 39.79 + 45 + 67 + 88 =
  40. 40.19 + 13 + 20 + 88 =

Answer key

  1. 191
  2. 254
  3. 212
  4. 218
  5. 219
  6. 247
  7. 207
  8. 200
  9. 242
  10. 138
  11. 225
  12. 171
  13. 281
  14. 165
  15. 244
  16. 190
  17. 260
  18. 231
  19. 227
  20. 173
  21. 228
  22. 254
  23. 137
  24. 277
  25. 231
  26. 244
  27. 221
  28. 153
  29. 224
  30. 205
  31. 93
  32. 218
  33. 152
  34. 203
  35. 254
  36. 226
  37. 247
  38. 129
  39. 279
  40. 140

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