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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 811 · 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 + 65 + 78 + 16 =
  2. 2.49 + 26 + 16 + 88 =
  3. 3.68 + 52 + 69 + 17 =
  4. 4.62 + 87 + 29 + 29 =
  5. 5.44 + 49 + 33 + 68 =
  6. 6.80 + 51 + 64 + 51 =
  7. 7.29 + 54 + 30 + 53 =
  8. 8.11 + 52 + 69 + 32 =
  9. 9.18 + 87 + 86 + 39 =
  10. 10.67 + 66 + 22 + 44 =
  11. 11.11 + 59 + 79 + 13 =
  12. 12.22 + 49 + 33 + 36 =
  13. 13.46 + 44 + 70 + 14 =
  14. 14.62 + 55 + 32 + 41 =
  15. 15.87 + 12 + 57 + 32 =
  16. 16.35 + 75 + 81 + 88 =
  17. 17.21 + 26 + 43 + 27 =
  18. 18.83 + 30 + 54 + 41 =
  19. 19.32 + 78 + 80 + 13 =
  20. 20.31 + 17 + 88 + 23 =
  21. 21.14 + 50 + 59 + 65 =
  22. 22.81 + 12 + 20 + 16 =
  23. 23.66 + 62 + 63 + 56 =
  24. 24.53 + 15 + 29 + 39 =
  25. 25.13 + 35 + 61 + 49 =
  26. 26.53 + 89 + 65 + 17 =
  27. 27.57 + 57 + 46 + 71 =
  28. 28.31 + 57 + 35 + 35 =
  29. 29.33 + 33 + 13 + 64 =
  30. 30.28 + 62 + 52 + 83 =
  31. 31.18 + 86 + 87 + 13 =
  32. 32.56 + 48 + 65 + 40 =
  33. 33.75 + 75 + 33 + 32 =
  34. 34.26 + 57 + 33 + 23 =
  35. 35.74 + 61 + 60 + 72 =
  36. 36.55 + 20 + 30 + 86 =
  37. 37.66 + 12 + 47 + 66 =
  38. 38.42 + 70 + 38 + 56 =
  39. 39.44 + 25 + 68 + 69 =
  40. 40.75 + 83 + 14 + 38 =

Answer key

  1. 176
  2. 179
  3. 206
  4. 207
  5. 194
  6. 246
  7. 166
  8. 164
  9. 230
  10. 199
  11. 162
  12. 140
  13. 174
  14. 190
  15. 188
  16. 279
  17. 117
  18. 208
  19. 203
  20. 159
  21. 188
  22. 129
  23. 247
  24. 136
  25. 158
  26. 224
  27. 231
  28. 158
  29. 143
  30. 225
  31. 204
  32. 209
  33. 215
  34. 139
  35. 267
  36. 191
  37. 191
  38. 206
  39. 206
  40. 210

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