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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 643 · 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. 1.37 + 44 + 74 + 33 =
  2. 2.30 + 14 + 87 + 83 =
  3. 3.16 + 43 + 79 + 54 =
  4. 4.85 + 44 + 33 + 77 =
  5. 5.78 + 27 + 85 + 70 =
  6. 6.82 + 84 + 46 + 56 =
  7. 7.47 + 28 + 85 + 37 =
  8. 8.34 + 77 + 30 + 15 =
  9. 9.20 + 87 + 19 + 34 =
  10. 10.69 + 29 + 89 + 53 =
  11. 11.34 + 28 + 48 + 79 =
  12. 12.65 + 74 + 80 + 34 =
  13. 13.88 + 23 + 63 + 60 =
  14. 14.26 + 80 + 75 + 52 =
  15. 15.20 + 88 + 29 + 12 =
  16. 16.86 + 22 + 17 + 21 =
  17. 17.58 + 49 + 86 + 65 =
  18. 18.41 + 55 + 54 + 28 =
  19. 19.78 + 45 + 45 + 14 =
  20. 20.89 + 13 + 56 + 15 =
  21. 21.39 + 89 + 44 + 42 =
  22. 22.19 + 15 + 48 + 42 =
  23. 23.57 + 82 + 85 + 33 =
  24. 24.13 + 56 + 36 + 12 =
  25. 25.54 + 61 + 27 + 16 =
  26. 26.68 + 30 + 26 + 39 =
  27. 27.22 + 54 + 12 + 28 =
  28. 28.46 + 19 + 64 + 68 =
  29. 29.76 + 88 + 62 + 55 =
  30. 30.34 + 60 + 16 + 35 =
  31. 31.62 + 24 + 25 + 11 =
  32. 32.85 + 30 + 61 + 17 =
  33. 33.39 + 43 + 27 + 20 =
  34. 34.31 + 19 + 36 + 22 =
  35. 35.88 + 89 + 84 + 64 =
  36. 36.62 + 15 + 53 + 12 =
  37. 37.57 + 26 + 68 + 71 =
  38. 38.39 + 44 + 80 + 20 =
  39. 39.59 + 61 + 23 + 64 =
  40. 40.88 + 58 + 70 + 81 =

Answer key

  1. 188
  2. 214
  3. 192
  4. 239
  5. 260
  6. 268
  7. 197
  8. 156
  9. 160
  10. 240
  11. 189
  12. 253
  13. 234
  14. 233
  15. 149
  16. 146
  17. 258
  18. 178
  19. 182
  20. 173
  21. 214
  22. 124
  23. 257
  24. 117
  25. 158
  26. 163
  27. 116
  28. 197
  29. 281
  30. 145
  31. 122
  32. 193
  33. 129
  34. 108
  35. 325
  36. 142
  37. 222
  38. 183
  39. 207
  40. 297

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