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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 449 · 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. 1.62 + 21 + 46 + 25 =
  2. 2.14 + 66 + 73 + 20 =
  3. 3.27 + 84 + 42 + 64 =
  4. 4.25 + 30 + 78 + 87 =
  5. 5.29 + 62 + 33 + 12 =
  6. 6.15 + 71 + 86 + 70 =
  7. 7.83 + 15 + 52 + 37 =
  8. 8.26 + 27 + 13 + 39 =
  9. 9.18 + 12 + 13 + 12 =
  10. 10.56 + 29 + 17 + 81 =
  11. 11.14 + 16 + 21 + 62 =
  12. 12.42 + 16 + 82 + 81 =
  13. 13.32 + 24 + 13 + 77 =
  14. 14.29 + 56 + 63 + 66 =
  15. 15.19 + 32 + 57 + 65 =
  16. 16.36 + 47 + 88 + 63 =
  17. 17.53 + 35 + 80 + 20 =
  18. 18.36 + 52 + 26 + 39 =
  19. 19.47 + 86 + 66 + 30 =
  20. 20.48 + 79 + 60 + 50 =
  21. 21.71 + 62 + 81 + 69 =
  22. 22.58 + 82 + 39 + 14 =
  23. 23.39 + 36 + 86 + 15 =
  24. 24.23 + 78 + 49 + 45 =
  25. 25.88 + 22 + 23 + 69 =
  26. 26.23 + 34 + 30 + 21 =
  27. 27.53 + 26 + 26 + 71 =
  28. 28.45 + 16 + 56 + 74 =
  29. 29.19 + 53 + 27 + 21 =
  30. 30.22 + 20 + 78 + 55 =
  31. 31.28 + 18 + 59 + 21 =
  32. 32.84 + 35 + 56 + 21 =
  33. 33.69 + 85 + 73 + 18 =
  34. 34.35 + 43 + 66 + 86 =
  35. 35.12 + 25 + 46 + 71 =
  36. 36.46 + 82 + 25 + 37 =
  37. 37.13 + 74 + 51 + 87 =
  38. 38.20 + 61 + 29 + 56 =
  39. 39.48 + 13 + 89 + 89 =
  40. 40.71 + 49 + 78 + 13 =

Answer key

  1. 154
  2. 173
  3. 217
  4. 220
  5. 136
  6. 242
  7. 187
  8. 105
  9. 55
  10. 183
  11. 113
  12. 221
  13. 146
  14. 214
  15. 173
  16. 234
  17. 188
  18. 153
  19. 229
  20. 237
  21. 283
  22. 193
  23. 176
  24. 195
  25. 202
  26. 108
  27. 176
  28. 191
  29. 120
  30. 175
  31. 126
  32. 196
  33. 245
  34. 230
  35. 154
  36. 190
  37. 225
  38. 166
  39. 239
  40. 211

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