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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 742 · 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. 1.66 + 22 + 23 + 72 =
  2. 2.58 + 74 + 68 + 47 =
  3. 3.16 + 28 + 79 + 69 =
  4. 4.71 + 12 + 30 + 25 =
  5. 5.18 + 73 + 81 + 32 =
  6. 6.70 + 86 + 80 + 18 =
  7. 7.85 + 11 + 84 + 18 =
  8. 8.30 + 42 + 57 + 56 =
  9. 9.11 + 47 + 24 + 18 =
  10. 10.61 + 32 + 75 + 67 =
  11. 11.70 + 16 + 57 + 22 =
  12. 12.35 + 27 + 85 + 19 =
  13. 13.59 + 67 + 30 + 25 =
  14. 14.55 + 59 + 80 + 72 =
  15. 15.86 + 62 + 76 + 69 =
  16. 16.11 + 12 + 50 + 84 =
  17. 17.39 + 44 + 82 + 67 =
  18. 18.43 + 22 + 84 + 57 =
  19. 19.61 + 53 + 37 + 33 =
  20. 20.46 + 56 + 70 + 62 =
  21. 21.88 + 55 + 85 + 71 =
  22. 22.33 + 70 + 50 + 81 =
  23. 23.33 + 84 + 64 + 34 =
  24. 24.21 + 88 + 84 + 20 =
  25. 25.79 + 41 + 13 + 39 =
  26. 26.82 + 54 + 45 + 73 =
  27. 27.23 + 49 + 74 + 31 =
  28. 28.11 + 81 + 37 + 20 =
  29. 29.32 + 61 + 30 + 13 =
  30. 30.70 + 37 + 41 + 41 =
  31. 31.64 + 69 + 83 + 74 =
  32. 32.32 + 28 + 50 + 17 =
  33. 33.83 + 78 + 34 + 51 =
  34. 34.78 + 69 + 27 + 19 =
  35. 35.23 + 34 + 66 + 80 =
  36. 36.33 + 51 + 31 + 89 =
  37. 37.26 + 76 + 44 + 59 =
  38. 38.80 + 43 + 77 + 25 =
  39. 39.80 + 32 + 31 + 63 =
  40. 40.14 + 36 + 66 + 47 =

Answer key

  1. 183
  2. 247
  3. 192
  4. 138
  5. 204
  6. 254
  7. 198
  8. 185
  9. 100
  10. 235
  11. 165
  12. 166
  13. 181
  14. 266
  15. 293
  16. 157
  17. 232
  18. 206
  19. 184
  20. 234
  21. 299
  22. 234
  23. 215
  24. 213
  25. 172
  26. 254
  27. 177
  28. 149
  29. 136
  30. 189
  31. 290
  32. 127
  33. 246
  34. 193
  35. 203
  36. 204
  37. 205
  38. 225
  39. 206
  40. 163

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