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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 663 · 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. 1.25 + 13 + 31 + 87 =
  2. 2.39 + 68 + 39 + 48 =
  3. 3.26 + 15 + 85 + 56 =
  4. 4.26 + 55 + 63 + 11 =
  5. 5.82 + 16 + 23 + 54 =
  6. 6.17 + 18 + 34 + 80 =
  7. 7.14 + 62 + 29 + 52 =
  8. 8.60 + 40 + 81 + 53 =
  9. 9.80 + 21 + 14 + 63 =
  10. 10.79 + 17 + 13 + 32 =
  11. 11.82 + 34 + 22 + 29 =
  12. 12.26 + 36 + 46 + 39 =
  13. 13.46 + 42 + 53 + 56 =
  14. 14.13 + 26 + 12 + 39 =
  15. 15.79 + 70 + 30 + 58 =
  16. 16.62 + 73 + 84 + 22 =
  17. 17.69 + 59 + 21 + 46 =
  18. 18.36 + 32 + 22 + 59 =
  19. 19.37 + 86 + 88 + 49 =
  20. 20.13 + 29 + 82 + 81 =
  21. 21.37 + 42 + 13 + 67 =
  22. 22.25 + 43 + 24 + 74 =
  23. 23.63 + 29 + 50 + 41 =
  24. 24.27 + 72 + 89 + 79 =
  25. 25.85 + 80 + 69 + 27 =
  26. 26.18 + 24 + 37 + 17 =
  27. 27.74 + 80 + 30 + 70 =
  28. 28.14 + 54 + 72 + 15 =
  29. 29.89 + 52 + 89 + 84 =
  30. 30.47 + 40 + 20 + 81 =
  31. 31.22 + 19 + 34 + 62 =
  32. 32.67 + 35 + 21 + 19 =
  33. 33.46 + 27 + 27 + 16 =
  34. 34.53 + 47 + 14 + 38 =
  35. 35.54 + 19 + 39 + 11 =
  36. 36.72 + 62 + 39 + 22 =
  37. 37.35 + 64 + 68 + 58 =
  38. 38.47 + 27 + 23 + 18 =
  39. 39.87 + 76 + 81 + 30 =
  40. 40.15 + 22 + 32 + 19 =

Answer key

  1. 156
  2. 194
  3. 182
  4. 155
  5. 175
  6. 149
  7. 157
  8. 234
  9. 178
  10. 141
  11. 167
  12. 147
  13. 197
  14. 90
  15. 237
  16. 241
  17. 195
  18. 149
  19. 260
  20. 205
  21. 159
  22. 166
  23. 183
  24. 267
  25. 261
  26. 96
  27. 254
  28. 155
  29. 314
  30. 188
  31. 137
  32. 142
  33. 116
  34. 152
  35. 123
  36. 195
  37. 225
  38. 115
  39. 274
  40. 88

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