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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 802 · 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. 1.31 + 18 + 30 + 31 =
  2. 2.12 + 60 + 88 + 11 =
  3. 3.65 + 52 + 42 + 76 =
  4. 4.76 + 11 + 42 + 11 =
  5. 5.53 + 40 + 88 + 24 =
  6. 6.45 + 88 + 24 + 47 =
  7. 7.12 + 29 + 38 + 77 =
  8. 8.62 + 67 + 26 + 74 =
  9. 9.81 + 19 + 16 + 17 =
  10. 10.80 + 23 + 29 + 19 =
  11. 11.21 + 34 + 54 + 80 =
  12. 12.48 + 12 + 19 + 79 =
  13. 13.69 + 47 + 82 + 33 =
  14. 14.30 + 38 + 30 + 63 =
  15. 15.68 + 71 + 87 + 14 =
  16. 16.32 + 71 + 41 + 72 =
  17. 17.51 + 32 + 19 + 51 =
  18. 18.56 + 23 + 29 + 81 =
  19. 19.87 + 22 + 47 + 26 =
  20. 20.23 + 89 + 39 + 14 =
  21. 21.31 + 58 + 47 + 37 =
  22. 22.14 + 52 + 51 + 69 =
  23. 23.29 + 18 + 42 + 78 =
  24. 24.59 + 51 + 40 + 41 =
  25. 25.47 + 49 + 81 + 27 =
  26. 26.27 + 49 + 46 + 53 =
  27. 27.32 + 13 + 20 + 26 =
  28. 28.22 + 24 + 13 + 84 =
  29. 29.83 + 68 + 56 + 39 =
  30. 30.57 + 60 + 74 + 46 =
  31. 31.17 + 57 + 54 + 88 =
  32. 32.40 + 28 + 17 + 44 =
  33. 33.84 + 23 + 79 + 83 =
  34. 34.73 + 17 + 28 + 71 =
  35. 35.67 + 12 + 82 + 68 =
  36. 36.86 + 18 + 56 + 28 =
  37. 37.82 + 68 + 51 + 83 =
  38. 38.77 + 72 + 45 + 25 =
  39. 39.36 + 23 + 64 + 65 =
  40. 40.53 + 37 + 88 + 81 =

Answer key

  1. 110
  2. 171
  3. 235
  4. 140
  5. 205
  6. 204
  7. 156
  8. 229
  9. 133
  10. 151
  11. 189
  12. 158
  13. 231
  14. 161
  15. 240
  16. 216
  17. 153
  18. 189
  19. 182
  20. 165
  21. 173
  22. 186
  23. 167
  24. 191
  25. 204
  26. 175
  27. 91
  28. 143
  29. 246
  30. 237
  31. 216
  32. 129
  33. 269
  34. 189
  35. 229
  36. 188
  37. 284
  38. 219
  39. 188
  40. 259

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