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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 247 · 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. 1.77 + 28 + 13 + 16 =
  2. 2.79 + 71 + 46 + 89 =
  3. 3.32 + 24 + 20 + 88 =
  4. 4.77 + 19 + 44 + 87 =
  5. 5.66 + 87 + 88 + 26 =
  6. 6.43 + 70 + 66 + 24 =
  7. 7.14 + 28 + 14 + 14 =
  8. 8.64 + 13 + 31 + 33 =
  9. 9.27 + 29 + 25 + 87 =
  10. 10.68 + 22 + 88 + 12 =
  11. 11.73 + 69 + 37 + 25 =
  12. 12.78 + 20 + 12 + 48 =
  13. 13.19 + 87 + 47 + 34 =
  14. 14.28 + 66 + 47 + 66 =
  15. 15.15 + 76 + 44 + 47 =
  16. 16.87 + 46 + 34 + 32 =
  17. 17.21 + 15 + 68 + 20 =
  18. 18.74 + 17 + 73 + 71 =
  19. 19.76 + 58 + 27 + 13 =
  20. 20.13 + 72 + 43 + 53 =
  21. 21.70 + 85 + 34 + 18 =
  22. 22.76 + 20 + 51 + 61 =
  23. 23.35 + 60 + 25 + 29 =
  24. 24.12 + 57 + 52 + 81 =
  25. 25.68 + 49 + 78 + 24 =
  26. 26.89 + 48 + 87 + 66 =
  27. 27.47 + 49 + 32 + 45 =
  28. 28.50 + 78 + 64 + 48 =
  29. 29.40 + 53 + 62 + 22 =
  30. 30.47 + 55 + 55 + 75 =
  31. 31.87 + 54 + 41 + 42 =
  32. 32.22 + 39 + 85 + 30 =
  33. 33.27 + 30 + 40 + 67 =
  34. 34.13 + 77 + 22 + 14 =
  35. 35.21 + 11 + 17 + 17 =
  36. 36.13 + 18 + 25 + 18 =
  37. 37.66 + 53 + 38 + 80 =
  38. 38.64 + 84 + 16 + 51 =
  39. 39.58 + 47 + 40 + 18 =
  40. 40.14 + 27 + 26 + 54 =

Answer key

  1. 134
  2. 285
  3. 164
  4. 227
  5. 267
  6. 203
  7. 70
  8. 141
  9. 168
  10. 190
  11. 204
  12. 158
  13. 187
  14. 207
  15. 182
  16. 199
  17. 124
  18. 235
  19. 174
  20. 181
  21. 207
  22. 208
  23. 149
  24. 202
  25. 219
  26. 290
  27. 173
  28. 240
  29. 177
  30. 232
  31. 224
  32. 176
  33. 164
  34. 126
  35. 66
  36. 74
  37. 237
  38. 215
  39. 163
  40. 121

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