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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 20 · 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. 1.74 + 19 + 84 + 31 =
  2. 2.40 + 62 + 18 + 28 =
  3. 3.48 + 80 + 58 + 42 =
  4. 4.53 + 84 + 41 + 20 =
  5. 5.39 + 65 + 32 + 62 =
  6. 6.40 + 23 + 26 + 78 =
  7. 7.21 + 31 + 79 + 82 =
  8. 8.25 + 38 + 75 + 78 =
  9. 9.19 + 49 + 62 + 17 =
  10. 10.11 + 38 + 49 + 26 =
  11. 11.31 + 68 + 52 + 89 =
  12. 12.22 + 55 + 53 + 35 =
  13. 13.36 + 20 + 67 + 19 =
  14. 14.29 + 20 + 83 + 11 =
  15. 15.66 + 80 + 26 + 36 =
  16. 16.26 + 27 + 20 + 33 =
  17. 17.70 + 73 + 89 + 83 =
  18. 18.76 + 23 + 77 + 47 =
  19. 19.54 + 35 + 63 + 12 =
  20. 20.60 + 70 + 89 + 26 =
  21. 21.77 + 12 + 76 + 14 =
  22. 22.46 + 74 + 15 + 19 =
  23. 23.85 + 76 + 86 + 32 =
  24. 24.81 + 43 + 30 + 88 =
  25. 25.60 + 52 + 14 + 64 =
  26. 26.88 + 45 + 71 + 14 =
  27. 27.29 + 46 + 41 + 24 =
  28. 28.29 + 48 + 11 + 82 =
  29. 29.12 + 12 + 27 + 55 =
  30. 30.27 + 32 + 36 + 33 =
  31. 31.29 + 58 + 64 + 58 =
  32. 32.35 + 57 + 53 + 59 =
  33. 33.24 + 68 + 49 + 64 =
  34. 34.76 + 34 + 34 + 75 =
  35. 35.31 + 12 + 77 + 68 =
  36. 36.60 + 81 + 89 + 82 =
  37. 37.80 + 72 + 23 + 27 =
  38. 38.79 + 73 + 80 + 85 =
  39. 39.16 + 11 + 76 + 64 =
  40. 40.81 + 83 + 59 + 51 =

Answer key

  1. 208
  2. 148
  3. 228
  4. 198
  5. 198
  6. 167
  7. 213
  8. 216
  9. 147
  10. 124
  11. 240
  12. 165
  13. 142
  14. 143
  15. 208
  16. 106
  17. 315
  18. 223
  19. 164
  20. 245
  21. 179
  22. 154
  23. 279
  24. 242
  25. 190
  26. 218
  27. 140
  28. 170
  29. 106
  30. 128
  31. 209
  32. 204
  33. 205
  34. 219
  35. 188
  36. 312
  37. 202
  38. 317
  39. 167
  40. 274

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