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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 705 · 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. 1.23 + 87 + 85 + 79 =
  2. 2.39 + 78 + 20 + 30 =
  3. 3.87 + 31 + 38 + 68 =
  4. 4.17 + 86 + 65 + 40 =
  5. 5.15 + 28 + 83 + 34 =
  6. 6.55 + 48 + 40 + 13 =
  7. 7.29 + 49 + 17 + 15 =
  8. 8.80 + 13 + 85 + 64 =
  9. 9.52 + 56 + 50 + 72 =
  10. 10.11 + 61 + 84 + 78 =
  11. 11.87 + 14 + 31 + 30 =
  12. 12.64 + 52 + 31 + 75 =
  13. 13.73 + 85 + 80 + 57 =
  14. 14.45 + 42 + 44 + 31 =
  15. 15.20 + 84 + 68 + 48 =
  16. 16.13 + 80 + 53 + 16 =
  17. 17.18 + 41 + 80 + 25 =
  18. 18.24 + 52 + 38 + 15 =
  19. 19.35 + 72 + 39 + 53 =
  20. 20.25 + 58 + 69 + 68 =
  21. 21.57 + 88 + 89 + 18 =
  22. 22.35 + 12 + 51 + 45 =
  23. 23.32 + 89 + 44 + 28 =
  24. 24.26 + 31 + 52 + 74 =
  25. 25.30 + 66 + 77 + 62 =
  26. 26.72 + 82 + 89 + 18 =
  27. 27.27 + 78 + 83 + 55 =
  28. 28.44 + 30 + 50 + 33 =
  29. 29.36 + 82 + 30 + 48 =
  30. 30.19 + 83 + 77 + 34 =
  31. 31.46 + 17 + 47 + 62 =
  32. 32.19 + 45 + 29 + 19 =
  33. 33.60 + 87 + 83 + 25 =
  34. 34.53 + 33 + 15 + 48 =
  35. 35.61 + 21 + 72 + 68 =
  36. 36.83 + 33 + 72 + 23 =
  37. 37.31 + 83 + 45 + 56 =
  38. 38.24 + 68 + 42 + 27 =
  39. 39.15 + 45 + 62 + 84 =
  40. 40.14 + 65 + 41 + 37 =

Answer key

  1. 274
  2. 167
  3. 224
  4. 208
  5. 160
  6. 156
  7. 110
  8. 242
  9. 230
  10. 234
  11. 162
  12. 222
  13. 295
  14. 162
  15. 220
  16. 162
  17. 164
  18. 129
  19. 199
  20. 220
  21. 252
  22. 143
  23. 193
  24. 183
  25. 235
  26. 261
  27. 243
  28. 157
  29. 196
  30. 213
  31. 172
  32. 112
  33. 255
  34. 149
  35. 222
  36. 211
  37. 215
  38. 161
  39. 206
  40. 157

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