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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 260 · 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. 1.17 + 25 + 13 + 45 =
  2. 2.19 + 64 + 72 + 15 =
  3. 3.11 + 83 + 71 + 40 =
  4. 4.16 + 24 + 40 + 83 =
  5. 5.62 + 31 + 48 + 76 =
  6. 6.77 + 16 + 87 + 15 =
  7. 7.22 + 73 + 66 + 17 =
  8. 8.83 + 55 + 82 + 12 =
  9. 9.43 + 74 + 44 + 67 =
  10. 10.46 + 26 + 82 + 57 =
  11. 11.38 + 39 + 68 + 59 =
  12. 12.53 + 86 + 44 + 66 =
  13. 13.77 + 17 + 78 + 44 =
  14. 14.33 + 19 + 24 + 27 =
  15. 15.15 + 48 + 29 + 64 =
  16. 16.26 + 15 + 86 + 39 =
  17. 17.57 + 17 + 55 + 82 =
  18. 18.30 + 62 + 77 + 28 =
  19. 19.62 + 27 + 17 + 41 =
  20. 20.52 + 64 + 16 + 22 =
  21. 21.18 + 26 + 16 + 27 =
  22. 22.21 + 46 + 34 + 28 =
  23. 23.38 + 45 + 40 + 66 =
  24. 24.15 + 27 + 89 + 40 =
  25. 25.22 + 33 + 48 + 39 =
  26. 26.25 + 63 + 27 + 67 =
  27. 27.73 + 68 + 44 + 37 =
  28. 28.29 + 74 + 38 + 75 =
  29. 29.50 + 12 + 56 + 61 =
  30. 30.54 + 28 + 39 + 56 =
  31. 31.75 + 17 + 72 + 17 =
  32. 32.38 + 21 + 36 + 17 =
  33. 33.11 + 81 + 30 + 75 =
  34. 34.82 + 46 + 65 + 80 =
  35. 35.31 + 84 + 58 + 16 =
  36. 36.19 + 23 + 20 + 28 =
  37. 37.17 + 29 + 48 + 43 =
  38. 38.33 + 61 + 19 + 25 =
  39. 39.16 + 19 + 15 + 22 =
  40. 40.21 + 74 + 28 + 69 =

Answer key

  1. 100
  2. 170
  3. 205
  4. 163
  5. 217
  6. 195
  7. 178
  8. 232
  9. 228
  10. 211
  11. 204
  12. 249
  13. 216
  14. 103
  15. 156
  16. 166
  17. 211
  18. 197
  19. 147
  20. 154
  21. 87
  22. 129
  23. 189
  24. 171
  25. 142
  26. 182
  27. 222
  28. 216
  29. 179
  30. 177
  31. 181
  32. 112
  33. 197
  34. 273
  35. 189
  36. 90
  37. 137
  38. 138
  39. 72
  40. 192

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