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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 556 · 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. 1.15 + 49 + 60 + 12 =
  2. 2.64 + 81 + 47 + 89 =
  3. 3.41 + 14 + 69 + 84 =
  4. 4.57 + 31 + 54 + 84 =
  5. 5.14 + 65 + 58 + 60 =
  6. 6.86 + 89 + 68 + 45 =
  7. 7.35 + 40 + 80 + 43 =
  8. 8.13 + 18 + 89 + 47 =
  9. 9.40 + 23 + 29 + 30 =
  10. 10.35 + 83 + 32 + 12 =
  11. 11.66 + 55 + 20 + 76 =
  12. 12.68 + 30 + 35 + 66 =
  13. 13.25 + 69 + 89 + 25 =
  14. 14.84 + 86 + 22 + 11 =
  15. 15.20 + 87 + 46 + 68 =
  16. 16.69 + 72 + 46 + 52 =
  17. 17.72 + 32 + 86 + 21 =
  18. 18.65 + 41 + 68 + 15 =
  19. 19.50 + 83 + 38 + 12 =
  20. 20.24 + 59 + 11 + 11 =
  21. 21.46 + 26 + 31 + 22 =
  22. 22.76 + 25 + 13 + 89 =
  23. 23.46 + 66 + 13 + 44 =
  24. 24.76 + 39 + 14 + 83 =
  25. 25.63 + 50 + 58 + 33 =
  26. 26.65 + 13 + 71 + 23 =
  27. 27.45 + 83 + 26 + 16 =
  28. 28.49 + 21 + 68 + 15 =
  29. 29.12 + 75 + 50 + 52 =
  30. 30.12 + 54 + 63 + 16 =
  31. 31.80 + 55 + 54 + 49 =
  32. 32.28 + 46 + 69 + 24 =
  33. 33.17 + 14 + 52 + 74 =
  34. 34.84 + 22 + 72 + 44 =
  35. 35.47 + 32 + 14 + 70 =
  36. 36.23 + 53 + 88 + 11 =
  37. 37.79 + 77 + 67 + 20 =
  38. 38.53 + 74 + 88 + 72 =
  39. 39.34 + 28 + 56 + 55 =
  40. 40.79 + 87 + 30 + 83 =

Answer key

  1. 136
  2. 281
  3. 208
  4. 226
  5. 197
  6. 288
  7. 198
  8. 167
  9. 122
  10. 162
  11. 217
  12. 199
  13. 208
  14. 203
  15. 221
  16. 239
  17. 211
  18. 189
  19. 183
  20. 105
  21. 125
  22. 203
  23. 169
  24. 212
  25. 204
  26. 172
  27. 170
  28. 153
  29. 189
  30. 145
  31. 238
  32. 167
  33. 157
  34. 222
  35. 163
  36. 175
  37. 243
  38. 287
  39. 173
  40. 279

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