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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 257 · 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. 1.51 + 14 + 59 + 27 =
  2. 2.70 + 61 + 89 + 38 =
  3. 3.60 + 73 + 37 + 29 =
  4. 4.60 + 34 + 23 + 82 =
  5. 5.58 + 13 + 12 + 79 =
  6. 6.13 + 32 + 22 + 81 =
  7. 7.12 + 83 + 54 + 76 =
  8. 8.36 + 20 + 20 + 70 =
  9. 9.11 + 32 + 52 + 14 =
  10. 10.70 + 29 + 36 + 80 =
  11. 11.30 + 31 + 12 + 86 =
  12. 12.46 + 35 + 60 + 72 =
  13. 13.46 + 55 + 87 + 78 =
  14. 14.27 + 70 + 53 + 54 =
  15. 15.30 + 74 + 42 + 25 =
  16. 16.54 + 58 + 85 + 62 =
  17. 17.36 + 88 + 13 + 87 =
  18. 18.37 + 63 + 76 + 30 =
  19. 19.12 + 51 + 41 + 69 =
  20. 20.52 + 83 + 56 + 89 =
  21. 21.27 + 39 + 78 + 14 =
  22. 22.47 + 29 + 34 + 36 =
  23. 23.24 + 83 + 23 + 27 =
  24. 24.40 + 25 + 17 + 68 =
  25. 25.37 + 19 + 58 + 24 =
  26. 26.41 + 51 + 12 + 72 =
  27. 27.27 + 40 + 52 + 45 =
  28. 28.83 + 28 + 62 + 50 =
  29. 29.15 + 85 + 28 + 69 =
  30. 30.69 + 73 + 40 + 33 =
  31. 31.82 + 25 + 72 + 28 =
  32. 32.69 + 16 + 82 + 17 =
  33. 33.20 + 71 + 85 + 32 =
  34. 34.47 + 89 + 68 + 84 =
  35. 35.36 + 79 + 69 + 37 =
  36. 36.77 + 22 + 42 + 40 =
  37. 37.68 + 69 + 31 + 22 =
  38. 38.71 + 39 + 56 + 16 =
  39. 39.72 + 47 + 66 + 46 =
  40. 40.26 + 35 + 46 + 23 =

Answer key

  1. 151
  2. 258
  3. 199
  4. 199
  5. 162
  6. 148
  7. 225
  8. 146
  9. 109
  10. 215
  11. 159
  12. 213
  13. 266
  14. 204
  15. 171
  16. 259
  17. 224
  18. 206
  19. 173
  20. 280
  21. 158
  22. 146
  23. 157
  24. 150
  25. 138
  26. 176
  27. 164
  28. 223
  29. 197
  30. 215
  31. 207
  32. 184
  33. 208
  34. 288
  35. 221
  36. 181
  37. 190
  38. 182
  39. 231
  40. 130

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