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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 645 · 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. 1.38 + 47 + 22 + 33 =
  2. 2.49 + 85 + 17 + 23 =
  3. 3.72 + 60 + 49 + 38 =
  4. 4.31 + 20 + 29 + 89 =
  5. 5.49 + 67 + 40 + 13 =
  6. 6.22 + 24 + 26 + 29 =
  7. 7.87 + 61 + 31 + 30 =
  8. 8.72 + 31 + 67 + 72 =
  9. 9.40 + 22 + 88 + 41 =
  10. 10.66 + 37 + 24 + 37 =
  11. 11.42 + 68 + 28 + 35 =
  12. 12.32 + 28 + 54 + 33 =
  13. 13.28 + 22 + 76 + 49 =
  14. 14.25 + 11 + 34 + 47 =
  15. 15.17 + 26 + 61 + 60 =
  16. 16.85 + 36 + 18 + 57 =
  17. 17.45 + 77 + 50 + 34 =
  18. 18.88 + 84 + 31 + 37 =
  19. 19.21 + 38 + 84 + 32 =
  20. 20.63 + 71 + 63 + 28 =
  21. 21.78 + 26 + 47 + 25 =
  22. 22.22 + 57 + 37 + 19 =
  23. 23.75 + 87 + 65 + 79 =
  24. 24.61 + 17 + 25 + 49 =
  25. 25.76 + 83 + 54 + 27 =
  26. 26.74 + 70 + 47 + 16 =
  27. 27.72 + 22 + 26 + 28 =
  28. 28.24 + 28 + 46 + 74 =
  29. 29.71 + 39 + 84 + 72 =
  30. 30.75 + 15 + 67 + 87 =
  31. 31.15 + 63 + 26 + 18 =
  32. 32.55 + 57 + 30 + 29 =
  33. 33.54 + 34 + 78 + 51 =
  34. 34.51 + 41 + 23 + 28 =
  35. 35.39 + 20 + 42 + 75 =
  36. 36.52 + 39 + 34 + 67 =
  37. 37.33 + 44 + 63 + 24 =
  38. 38.75 + 47 + 82 + 63 =
  39. 39.48 + 30 + 38 + 62 =
  40. 40.77 + 21 + 12 + 45 =

Answer key

  1. 140
  2. 174
  3. 219
  4. 169
  5. 169
  6. 101
  7. 209
  8. 242
  9. 191
  10. 164
  11. 173
  12. 147
  13. 175
  14. 117
  15. 164
  16. 196
  17. 206
  18. 240
  19. 175
  20. 225
  21. 176
  22. 135
  23. 306
  24. 152
  25. 240
  26. 207
  27. 148
  28. 172
  29. 266
  30. 244
  31. 122
  32. 171
  33. 217
  34. 143
  35. 176
  36. 192
  37. 164
  38. 267
  39. 178
  40. 155

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