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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 500 · 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. 1.60 + 21 + 35 + 44 =
  2. 2.13 + 58 + 13 + 36 =
  3. 3.63 + 23 + 61 + 78 =
  4. 4.20 + 39 + 21 + 72 =
  5. 5.83 + 58 + 59 + 38 =
  6. 6.75 + 63 + 17 + 13 =
  7. 7.19 + 63 + 80 + 33 =
  8. 8.57 + 39 + 15 + 11 =
  9. 9.87 + 32 + 33 + 28 =
  10. 10.81 + 16 + 39 + 15 =
  11. 11.54 + 23 + 85 + 21 =
  12. 12.89 + 14 + 88 + 72 =
  13. 13.73 + 76 + 24 + 84 =
  14. 14.12 + 63 + 29 + 46 =
  15. 15.80 + 75 + 11 + 48 =
  16. 16.69 + 22 + 59 + 43 =
  17. 17.13 + 29 + 32 + 81 =
  18. 18.39 + 38 + 68 + 70 =
  19. 19.80 + 57 + 25 + 57 =
  20. 20.65 + 59 + 64 + 16 =
  21. 21.42 + 84 + 77 + 71 =
  22. 22.69 + 23 + 12 + 45 =
  23. 23.36 + 89 + 59 + 19 =
  24. 24.84 + 40 + 82 + 14 =
  25. 25.87 + 89 + 41 + 45 =
  26. 26.54 + 41 + 22 + 63 =
  27. 27.39 + 89 + 35 + 12 =
  28. 28.25 + 14 + 51 + 87 =
  29. 29.14 + 83 + 41 + 35 =
  30. 30.19 + 15 + 60 + 60 =
  31. 31.75 + 27 + 74 + 55 =
  32. 32.26 + 36 + 12 + 73 =
  33. 33.71 + 65 + 38 + 36 =
  34. 34.29 + 58 + 65 + 27 =
  35. 35.65 + 37 + 30 + 67 =
  36. 36.17 + 40 + 79 + 23 =
  37. 37.71 + 25 + 87 + 17 =
  38. 38.16 + 11 + 45 + 75 =
  39. 39.13 + 79 + 65 + 68 =
  40. 40.43 + 12 + 20 + 87 =

Answer key

  1. 160
  2. 120
  3. 225
  4. 152
  5. 238
  6. 168
  7. 195
  8. 122
  9. 180
  10. 151
  11. 183
  12. 263
  13. 257
  14. 150
  15. 214
  16. 193
  17. 155
  18. 215
  19. 219
  20. 204
  21. 274
  22. 149
  23. 203
  24. 220
  25. 262
  26. 180
  27. 175
  28. 177
  29. 173
  30. 154
  31. 231
  32. 147
  33. 210
  34. 179
  35. 199
  36. 159
  37. 200
  38. 147
  39. 225
  40. 162

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