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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 441 · 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. 1.61 + 52 + 31 + 60 =
  2. 2.15 + 74 + 88 + 11 =
  3. 3.75 + 78 + 11 + 87 =
  4. 4.39 + 35 + 58 + 77 =
  5. 5.27 + 49 + 77 + 84 =
  6. 6.76 + 64 + 21 + 24 =
  7. 7.26 + 40 + 69 + 24 =
  8. 8.32 + 31 + 26 + 28 =
  9. 9.53 + 30 + 27 + 28 =
  10. 10.62 + 15 + 24 + 79 =
  11. 11.13 + 33 + 19 + 86 =
  12. 12.72 + 11 + 16 + 30 =
  13. 13.85 + 88 + 34 + 14 =
  14. 14.89 + 61 + 42 + 85 =
  15. 15.28 + 87 + 44 + 66 =
  16. 16.61 + 87 + 22 + 51 =
  17. 17.33 + 80 + 77 + 30 =
  18. 18.42 + 38 + 19 + 15 =
  19. 19.49 + 71 + 19 + 49 =
  20. 20.48 + 39 + 48 + 49 =
  21. 21.78 + 61 + 41 + 16 =
  22. 22.76 + 28 + 82 + 42 =
  23. 23.66 + 29 + 12 + 17 =
  24. 24.50 + 82 + 18 + 16 =
  25. 25.31 + 16 + 63 + 16 =
  26. 26.48 + 56 + 25 + 60 =
  27. 27.55 + 89 + 24 + 82 =
  28. 28.31 + 44 + 57 + 29 =
  29. 29.26 + 83 + 27 + 62 =
  30. 30.27 + 81 + 74 + 88 =
  31. 31.58 + 31 + 83 + 78 =
  32. 32.33 + 48 + 87 + 11 =
  33. 33.42 + 29 + 31 + 74 =
  34. 34.77 + 76 + 67 + 18 =
  35. 35.66 + 86 + 79 + 77 =
  36. 36.16 + 13 + 15 + 44 =
  37. 37.40 + 20 + 31 + 11 =
  38. 38.23 + 82 + 38 + 18 =
  39. 39.34 + 87 + 15 + 81 =
  40. 40.34 + 12 + 53 + 31 =

Answer key

  1. 204
  2. 188
  3. 251
  4. 209
  5. 237
  6. 185
  7. 159
  8. 117
  9. 138
  10. 180
  11. 151
  12. 129
  13. 221
  14. 277
  15. 225
  16. 221
  17. 220
  18. 114
  19. 188
  20. 184
  21. 196
  22. 228
  23. 124
  24. 166
  25. 126
  26. 189
  27. 250
  28. 161
  29. 198
  30. 270
  31. 250
  32. 179
  33. 176
  34. 238
  35. 308
  36. 88
  37. 102
  38. 161
  39. 217
  40. 130

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