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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 95 · 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. 1.27 + 17 + 60 + 19 =
  2. 2.42 + 72 + 40 + 32 =
  3. 3.33 + 32 + 78 + 50 =
  4. 4.77 + 18 + 35 + 25 =
  5. 5.17 + 86 + 78 + 17 =
  6. 6.16 + 36 + 12 + 14 =
  7. 7.33 + 75 + 38 + 81 =
  8. 8.74 + 85 + 37 + 80 =
  9. 9.61 + 78 + 40 + 84 =
  10. 10.66 + 25 + 56 + 88 =
  11. 11.71 + 13 + 78 + 25 =
  12. 12.29 + 75 + 11 + 89 =
  13. 13.39 + 57 + 77 + 79 =
  14. 14.43 + 18 + 21 + 25 =
  15. 15.65 + 78 + 84 + 22 =
  16. 16.42 + 78 + 43 + 68 =
  17. 17.54 + 57 + 82 + 12 =
  18. 18.55 + 52 + 69 + 32 =
  19. 19.78 + 23 + 33 + 61 =
  20. 20.72 + 74 + 45 + 80 =
  21. 21.71 + 15 + 51 + 16 =
  22. 22.17 + 30 + 33 + 70 =
  23. 23.50 + 84 + 41 + 36 =
  24. 24.77 + 65 + 47 + 25 =
  25. 25.83 + 82 + 71 + 11 =
  26. 26.62 + 60 + 40 + 72 =
  27. 27.51 + 25 + 48 + 81 =
  28. 28.74 + 11 + 13 + 16 =
  29. 29.70 + 54 + 74 + 12 =
  30. 30.88 + 68 + 73 + 60 =
  31. 31.26 + 28 + 28 + 14 =
  32. 32.49 + 78 + 54 + 47 =
  33. 33.36 + 13 + 13 + 87 =
  34. 34.23 + 32 + 69 + 63 =
  35. 35.79 + 16 + 56 + 45 =
  36. 36.43 + 83 + 27 + 58 =
  37. 37.15 + 57 + 86 + 28 =
  38. 38.52 + 81 + 19 + 86 =
  39. 39.58 + 33 + 18 + 58 =
  40. 40.50 + 58 + 45 + 74 =

Answer key

  1. 123
  2. 186
  3. 193
  4. 155
  5. 198
  6. 78
  7. 227
  8. 276
  9. 263
  10. 235
  11. 187
  12. 204
  13. 252
  14. 107
  15. 249
  16. 231
  17. 205
  18. 208
  19. 195
  20. 271
  21. 153
  22. 150
  23. 211
  24. 214
  25. 247
  26. 234
  27. 205
  28. 114
  29. 210
  30. 289
  31. 96
  32. 228
  33. 149
  34. 187
  35. 196
  36. 211
  37. 186
  38. 238
  39. 167
  40. 227

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