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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 83 · 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. 1.72 + 44 + 64 + 70 =
  2. 2.41 + 49 + 19 + 80 =
  3. 3.12 + 18 + 45 + 77 =
  4. 4.46 + 33 + 33 + 15 =
  5. 5.70 + 22 + 81 + 38 =
  6. 6.72 + 73 + 73 + 30 =
  7. 7.51 + 27 + 44 + 24 =
  8. 8.60 + 63 + 28 + 56 =
  9. 9.66 + 11 + 74 + 66 =
  10. 10.68 + 88 + 73 + 14 =
  11. 11.62 + 71 + 89 + 45 =
  12. 12.86 + 73 + 60 + 59 =
  13. 13.46 + 16 + 70 + 63 =
  14. 14.56 + 21 + 51 + 32 =
  15. 15.50 + 86 + 35 + 42 =
  16. 16.86 + 57 + 85 + 59 =
  17. 17.24 + 58 + 15 + 43 =
  18. 18.27 + 19 + 55 + 16 =
  19. 19.70 + 34 + 18 + 81 =
  20. 20.35 + 74 + 43 + 52 =
  21. 21.15 + 84 + 83 + 39 =
  22. 22.65 + 78 + 49 + 49 =
  23. 23.48 + 72 + 33 + 28 =
  24. 24.22 + 34 + 43 + 24 =
  25. 25.62 + 35 + 35 + 79 =
  26. 26.78 + 64 + 64 + 71 =
  27. 27.56 + 79 + 19 + 14 =
  28. 28.55 + 65 + 68 + 21 =
  29. 29.80 + 14 + 87 + 86 =
  30. 30.77 + 75 + 80 + 79 =
  31. 31.15 + 12 + 80 + 24 =
  32. 32.13 + 55 + 77 + 11 =
  33. 33.32 + 30 + 55 + 16 =
  34. 34.38 + 43 + 37 + 57 =
  35. 35.58 + 86 + 44 + 28 =
  36. 36.70 + 52 + 38 + 22 =
  37. 37.12 + 23 + 15 + 20 =
  38. 38.15 + 42 + 50 + 81 =
  39. 39.17 + 61 + 28 + 73 =
  40. 40.54 + 77 + 13 + 29 =

Answer key

  1. 250
  2. 189
  3. 152
  4. 127
  5. 211
  6. 248
  7. 146
  8. 207
  9. 217
  10. 243
  11. 267
  12. 278
  13. 195
  14. 160
  15. 213
  16. 287
  17. 140
  18. 117
  19. 203
  20. 204
  21. 221
  22. 241
  23. 181
  24. 123
  25. 211
  26. 277
  27. 168
  28. 209
  29. 267
  30. 311
  31. 131
  32. 156
  33. 133
  34. 175
  35. 216
  36. 182
  37. 70
  38. 188
  39. 179
  40. 173

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