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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 58 · 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. 1.70 + 56 + 64 + 41 =
  2. 2.72 + 86 + 64 + 20 =
  3. 3.11 + 25 + 14 + 64 =
  4. 4.82 + 57 + 83 + 15 =
  5. 5.20 + 80 + 61 + 71 =
  6. 6.12 + 42 + 71 + 55 =
  7. 7.33 + 30 + 20 + 38 =
  8. 8.82 + 88 + 30 + 39 =
  9. 9.70 + 77 + 55 + 86 =
  10. 10.12 + 13 + 41 + 13 =
  11. 11.81 + 47 + 84 + 67 =
  12. 12.37 + 79 + 74 + 70 =
  13. 13.28 + 48 + 53 + 17 =
  14. 14.81 + 79 + 51 + 53 =
  15. 15.82 + 44 + 29 + 30 =
  16. 16.12 + 47 + 61 + 79 =
  17. 17.87 + 43 + 24 + 71 =
  18. 18.13 + 33 + 69 + 12 =
  19. 19.59 + 52 + 22 + 29 =
  20. 20.28 + 17 + 63 + 73 =
  21. 21.58 + 80 + 44 + 12 =
  22. 22.65 + 59 + 68 + 15 =
  23. 23.50 + 69 + 49 + 52 =
  24. 24.76 + 65 + 61 + 73 =
  25. 25.79 + 71 + 38 + 26 =
  26. 26.44 + 13 + 82 + 23 =
  27. 27.53 + 84 + 84 + 35 =
  28. 28.48 + 22 + 30 + 50 =
  29. 29.60 + 21 + 44 + 57 =
  30. 30.39 + 43 + 77 + 70 =
  31. 31.19 + 38 + 83 + 37 =
  32. 32.66 + 26 + 23 + 11 =
  33. 33.76 + 23 + 57 + 18 =
  34. 34.67 + 31 + 40 + 46 =
  35. 35.16 + 66 + 27 + 13 =
  36. 36.19 + 23 + 52 + 18 =
  37. 37.89 + 34 + 33 + 12 =
  38. 38.14 + 76 + 28 + 78 =
  39. 39.14 + 39 + 46 + 84 =
  40. 40.73 + 48 + 16 + 74 =

Answer key

  1. 231
  2. 242
  3. 114
  4. 237
  5. 232
  6. 180
  7. 121
  8. 239
  9. 288
  10. 79
  11. 279
  12. 260
  13. 146
  14. 264
  15. 185
  16. 199
  17. 225
  18. 127
  19. 162
  20. 181
  21. 194
  22. 207
  23. 220
  24. 275
  25. 214
  26. 162
  27. 256
  28. 150
  29. 182
  30. 229
  31. 177
  32. 126
  33. 174
  34. 184
  35. 122
  36. 112
  37. 168
  38. 196
  39. 183
  40. 211

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