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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 345 · 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. 1.21 + 15 + 41 + 38 =
  2. 2.78 + 13 + 23 + 69 =
  3. 3.89 + 33 + 27 + 64 =
  4. 4.70 + 86 + 53 + 36 =
  5. 5.88 + 57 + 52 + 84 =
  6. 6.33 + 57 + 22 + 71 =
  7. 7.23 + 44 + 52 + 24 =
  8. 8.83 + 47 + 61 + 11 =
  9. 9.67 + 14 + 70 + 33 =
  10. 10.35 + 49 + 19 + 28 =
  11. 11.54 + 53 + 46 + 28 =
  12. 12.32 + 70 + 32 + 27 =
  13. 13.80 + 15 + 89 + 53 =
  14. 14.39 + 79 + 89 + 22 =
  15. 15.87 + 49 + 21 + 37 =
  16. 16.55 + 72 + 83 + 27 =
  17. 17.58 + 77 + 75 + 68 =
  18. 18.45 + 87 + 13 + 47 =
  19. 19.68 + 17 + 37 + 32 =
  20. 20.58 + 86 + 89 + 32 =
  21. 21.75 + 39 + 55 + 88 =
  22. 22.25 + 68 + 58 + 31 =
  23. 23.68 + 87 + 58 + 59 =
  24. 24.44 + 21 + 86 + 60 =
  25. 25.57 + 72 + 19 + 85 =
  26. 26.88 + 61 + 60 + 19 =
  27. 27.59 + 71 + 17 + 23 =
  28. 28.33 + 69 + 17 + 36 =
  29. 29.40 + 71 + 49 + 48 =
  30. 30.66 + 52 + 27 + 70 =
  31. 31.51 + 70 + 60 + 81 =
  32. 32.86 + 47 + 42 + 40 =
  33. 33.23 + 78 + 83 + 58 =
  34. 34.79 + 33 + 51 + 57 =
  35. 35.30 + 16 + 19 + 67 =
  36. 36.64 + 60 + 69 + 41 =
  37. 37.79 + 41 + 16 + 59 =
  38. 38.49 + 59 + 35 + 87 =
  39. 39.77 + 20 + 14 + 25 =
  40. 40.15 + 88 + 48 + 66 =

Answer key

  1. 115
  2. 183
  3. 213
  4. 245
  5. 281
  6. 183
  7. 143
  8. 202
  9. 184
  10. 131
  11. 181
  12. 161
  13. 237
  14. 229
  15. 194
  16. 237
  17. 278
  18. 192
  19. 154
  20. 265
  21. 257
  22. 182
  23. 272
  24. 211
  25. 233
  26. 228
  27. 170
  28. 155
  29. 208
  30. 215
  31. 262
  32. 215
  33. 242
  34. 220
  35. 132
  36. 234
  37. 195
  38. 230
  39. 136
  40. 217

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