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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 283 · 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. 1.52 + 50 + 63 + 40 =
  2. 2.18 + 89 + 25 + 17 =
  3. 3.42 + 66 + 86 + 77 =
  4. 4.20 + 36 + 59 + 11 =
  5. 5.11 + 39 + 79 + 57 =
  6. 6.61 + 83 + 63 + 87 =
  7. 7.67 + 86 + 85 + 51 =
  8. 8.12 + 84 + 32 + 11 =
  9. 9.15 + 61 + 75 + 37 =
  10. 10.30 + 31 + 55 + 69 =
  11. 11.25 + 43 + 33 + 84 =
  12. 12.82 + 47 + 63 + 49 =
  13. 13.41 + 62 + 51 + 41 =
  14. 14.51 + 77 + 80 + 82 =
  15. 15.72 + 14 + 11 + 67 =
  16. 16.32 + 38 + 87 + 26 =
  17. 17.87 + 61 + 20 + 52 =
  18. 18.12 + 36 + 21 + 43 =
  19. 19.56 + 27 + 62 + 50 =
  20. 20.38 + 56 + 50 + 40 =
  21. 21.18 + 21 + 13 + 37 =
  22. 22.23 + 25 + 65 + 69 =
  23. 23.86 + 41 + 13 + 45 =
  24. 24.52 + 11 + 35 + 18 =
  25. 25.24 + 48 + 76 + 35 =
  26. 26.43 + 56 + 85 + 33 =
  27. 27.21 + 16 + 57 + 86 =
  28. 28.64 + 14 + 24 + 50 =
  29. 29.80 + 53 + 83 + 39 =
  30. 30.23 + 27 + 65 + 74 =
  31. 31.75 + 59 + 23 + 74 =
  32. 32.21 + 28 + 32 + 26 =
  33. 33.41 + 50 + 62 + 72 =
  34. 34.43 + 20 + 49 + 57 =
  35. 35.56 + 39 + 67 + 88 =
  36. 36.27 + 31 + 65 + 35 =
  37. 37.19 + 27 + 25 + 50 =
  38. 38.30 + 45 + 81 + 41 =
  39. 39.63 + 22 + 23 + 87 =
  40. 40.87 + 13 + 82 + 63 =

Answer key

  1. 205
  2. 149
  3. 271
  4. 126
  5. 186
  6. 294
  7. 289
  8. 139
  9. 188
  10. 185
  11. 185
  12. 241
  13. 195
  14. 290
  15. 164
  16. 183
  17. 220
  18. 112
  19. 195
  20. 184
  21. 89
  22. 182
  23. 185
  24. 116
  25. 183
  26. 217
  27. 180
  28. 152
  29. 255
  30. 189
  31. 231
  32. 107
  33. 225
  34. 169
  35. 250
  36. 158
  37. 121
  38. 197
  39. 195
  40. 245

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