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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 70 · 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. 1.14 + 17 + 30 + 72 =
  2. 2.61 + 58 + 85 + 80 =
  3. 3.55 + 33 + 71 + 39 =
  4. 4.45 + 56 + 77 + 41 =
  5. 5.40 + 20 + 74 + 64 =
  6. 6.33 + 64 + 39 + 76 =
  7. 7.32 + 20 + 12 + 65 =
  8. 8.82 + 35 + 26 + 27 =
  9. 9.55 + 63 + 68 + 13 =
  10. 10.62 + 89 + 44 + 12 =
  11. 11.45 + 78 + 45 + 26 =
  12. 12.83 + 82 + 55 + 22 =
  13. 13.32 + 42 + 75 + 16 =
  14. 14.86 + 18 + 36 + 42 =
  15. 15.12 + 27 + 56 + 83 =
  16. 16.14 + 30 + 66 + 81 =
  17. 17.79 + 81 + 52 + 51 =
  18. 18.26 + 48 + 77 + 34 =
  19. 19.71 + 42 + 88 + 31 =
  20. 20.65 + 61 + 42 + 65 =
  21. 21.80 + 17 + 32 + 61 =
  22. 22.12 + 13 + 61 + 17 =
  23. 23.71 + 68 + 67 + 65 =
  24. 24.70 + 19 + 43 + 28 =
  25. 25.36 + 60 + 17 + 68 =
  26. 26.85 + 42 + 46 + 80 =
  27. 27.17 + 73 + 23 + 27 =
  28. 28.43 + 51 + 74 + 40 =
  29. 29.63 + 41 + 30 + 84 =
  30. 30.31 + 61 + 85 + 16 =
  31. 31.24 + 54 + 14 + 75 =
  32. 32.25 + 32 + 50 + 34 =
  33. 33.75 + 36 + 65 + 61 =
  34. 34.22 + 49 + 35 + 77 =
  35. 35.62 + 40 + 31 + 64 =
  36. 36.73 + 65 + 12 + 87 =
  37. 37.77 + 42 + 89 + 34 =
  38. 38.39 + 34 + 83 + 71 =
  39. 39.60 + 50 + 16 + 49 =
  40. 40.36 + 88 + 42 + 19 =

Answer key

  1. 133
  2. 284
  3. 198
  4. 219
  5. 198
  6. 212
  7. 129
  8. 170
  9. 199
  10. 207
  11. 194
  12. 242
  13. 165
  14. 182
  15. 178
  16. 191
  17. 263
  18. 185
  19. 232
  20. 233
  21. 190
  22. 103
  23. 271
  24. 160
  25. 181
  26. 253
  27. 140
  28. 208
  29. 218
  30. 193
  31. 167
  32. 141
  33. 237
  34. 183
  35. 197
  36. 237
  37. 242
  38. 227
  39. 175
  40. 185

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