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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 413 · 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. 1.72 + 40 + 31 + 87 =
  2. 2.30 + 86 + 82 + 31 =
  3. 3.53 + 67 + 54 + 28 =
  4. 4.78 + 84 + 39 + 18 =
  5. 5.77 + 57 + 11 + 15 =
  6. 6.22 + 71 + 11 + 75 =
  7. 7.14 + 33 + 35 + 21 =
  8. 8.25 + 85 + 80 + 26 =
  9. 9.14 + 48 + 65 + 17 =
  10. 10.56 + 31 + 21 + 22 =
  11. 11.37 + 31 + 59 + 22 =
  12. 12.33 + 30 + 85 + 19 =
  13. 13.18 + 38 + 27 + 44 =
  14. 14.39 + 11 + 18 + 55 =
  15. 15.57 + 44 + 78 + 28 =
  16. 16.68 + 38 + 19 + 82 =
  17. 17.88 + 15 + 19 + 16 =
  18. 18.16 + 85 + 56 + 85 =
  19. 19.17 + 11 + 26 + 44 =
  20. 20.69 + 51 + 51 + 12 =
  21. 21.55 + 82 + 88 + 60 =
  22. 22.68 + 11 + 76 + 23 =
  23. 23.76 + 72 + 68 + 20 =
  24. 24.74 + 12 + 49 + 32 =
  25. 25.35 + 72 + 37 + 77 =
  26. 26.57 + 46 + 23 + 31 =
  27. 27.41 + 23 + 64 + 55 =
  28. 28.51 + 86 + 25 + 28 =
  29. 29.53 + 68 + 53 + 18 =
  30. 30.59 + 30 + 30 + 20 =
  31. 31.32 + 82 + 18 + 85 =
  32. 32.21 + 80 + 13 + 19 =
  33. 33.62 + 50 + 88 + 34 =
  34. 34.28 + 55 + 11 + 31 =
  35. 35.87 + 23 + 12 + 68 =
  36. 36.63 + 55 + 69 + 26 =
  37. 37.13 + 86 + 74 + 74 =
  38. 38.86 + 63 + 29 + 56 =
  39. 39.73 + 33 + 69 + 82 =
  40. 40.44 + 83 + 37 + 52 =

Answer key

  1. 230
  2. 229
  3. 202
  4. 219
  5. 160
  6. 179
  7. 103
  8. 216
  9. 144
  10. 130
  11. 149
  12. 167
  13. 127
  14. 123
  15. 207
  16. 207
  17. 138
  18. 242
  19. 98
  20. 183
  21. 285
  22. 178
  23. 236
  24. 167
  25. 221
  26. 157
  27. 183
  28. 190
  29. 192
  30. 139
  31. 217
  32. 133
  33. 234
  34. 125
  35. 190
  36. 213
  37. 247
  38. 234
  39. 257
  40. 216

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