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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 436 · 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. 1.71 + 27 + 74 + 11 =
  2. 2.68 + 48 + 74 + 27 =
  3. 3.27 + 87 + 50 + 21 =
  4. 4.44 + 24 + 73 + 85 =
  5. 5.38 + 25 + 81 + 65 =
  6. 6.29 + 58 + 66 + 39 =
  7. 7.48 + 32 + 18 + 27 =
  8. 8.28 + 41 + 46 + 46 =
  9. 9.41 + 75 + 11 + 53 =
  10. 10.89 + 15 + 65 + 72 =
  11. 11.14 + 25 + 84 + 20 =
  12. 12.17 + 82 + 74 + 33 =
  13. 13.37 + 53 + 45 + 41 =
  14. 14.45 + 88 + 80 + 87 =
  15. 15.38 + 21 + 13 + 19 =
  16. 16.38 + 83 + 66 + 55 =
  17. 17.33 + 84 + 12 + 56 =
  18. 18.87 + 32 + 65 + 79 =
  19. 19.58 + 20 + 34 + 52 =
  20. 20.63 + 60 + 37 + 32 =
  21. 21.87 + 55 + 11 + 22 =
  22. 22.52 + 48 + 35 + 15 =
  23. 23.36 + 29 + 84 + 63 =
  24. 24.11 + 64 + 73 + 22 =
  25. 25.35 + 13 + 26 + 45 =
  26. 26.28 + 20 + 59 + 19 =
  27. 27.16 + 17 + 25 + 11 =
  28. 28.12 + 65 + 53 + 34 =
  29. 29.57 + 71 + 21 + 56 =
  30. 30.39 + 41 + 34 + 42 =
  31. 31.33 + 74 + 28 + 76 =
  32. 32.83 + 16 + 34 + 58 =
  33. 33.51 + 49 + 89 + 18 =
  34. 34.74 + 27 + 27 + 62 =
  35. 35.88 + 38 + 82 + 40 =
  36. 36.14 + 34 + 22 + 67 =
  37. 37.77 + 16 + 69 + 70 =
  38. 38.74 + 16 + 77 + 37 =
  39. 39.13 + 82 + 20 + 26 =
  40. 40.33 + 85 + 27 + 88 =

Answer key

  1. 183
  2. 217
  3. 185
  4. 226
  5. 209
  6. 192
  7. 125
  8. 161
  9. 180
  10. 241
  11. 143
  12. 206
  13. 176
  14. 300
  15. 91
  16. 242
  17. 185
  18. 263
  19. 164
  20. 192
  21. 175
  22. 150
  23. 212
  24. 170
  25. 119
  26. 126
  27. 69
  28. 164
  29. 205
  30. 156
  31. 211
  32. 191
  33. 207
  34. 190
  35. 248
  36. 137
  37. 232
  38. 204
  39. 141
  40. 233

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