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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 588 · 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. 1.56 + 34 + 50 + 12 =
  2. 2.55 + 77 + 28 + 20 =
  3. 3.78 + 26 + 60 + 83 =
  4. 4.30 + 52 + 58 + 37 =
  5. 5.24 + 56 + 56 + 39 =
  6. 6.33 + 22 + 20 + 45 =
  7. 7.66 + 39 + 72 + 82 =
  8. 8.34 + 50 + 57 + 76 =
  9. 9.52 + 59 + 40 + 29 =
  10. 10.43 + 86 + 71 + 59 =
  11. 11.13 + 16 + 45 + 41 =
  12. 12.50 + 58 + 40 + 59 =
  13. 13.43 + 35 + 71 + 29 =
  14. 14.47 + 84 + 65 + 64 =
  15. 15.53 + 40 + 26 + 45 =
  16. 16.88 + 68 + 40 + 30 =
  17. 17.75 + 34 + 75 + 29 =
  18. 18.42 + 48 + 70 + 68 =
  19. 19.34 + 76 + 80 + 66 =
  20. 20.50 + 83 + 71 + 50 =
  21. 21.61 + 26 + 68 + 37 =
  22. 22.65 + 71 + 66 + 20 =
  23. 23.20 + 29 + 85 + 36 =
  24. 24.48 + 87 + 79 + 45 =
  25. 25.13 + 61 + 31 + 39 =
  26. 26.15 + 19 + 25 + 72 =
  27. 27.52 + 12 + 34 + 22 =
  28. 28.86 + 77 + 84 + 76 =
  29. 29.71 + 61 + 20 + 62 =
  30. 30.38 + 34 + 39 + 79 =
  31. 31.64 + 65 + 11 + 14 =
  32. 32.77 + 22 + 70 + 17 =
  33. 33.37 + 38 + 37 + 77 =
  34. 34.68 + 27 + 89 + 56 =
  35. 35.28 + 49 + 89 + 40 =
  36. 36.79 + 76 + 72 + 79 =
  37. 37.26 + 14 + 68 + 31 =
  38. 38.20 + 42 + 77 + 25 =
  39. 39.75 + 58 + 34 + 39 =
  40. 40.46 + 82 + 31 + 55 =

Answer key

  1. 152
  2. 180
  3. 247
  4. 177
  5. 175
  6. 120
  7. 259
  8. 217
  9. 180
  10. 259
  11. 115
  12. 207
  13. 178
  14. 260
  15. 164
  16. 226
  17. 213
  18. 228
  19. 256
  20. 254
  21. 192
  22. 222
  23. 170
  24. 259
  25. 144
  26. 131
  27. 120
  28. 323
  29. 214
  30. 190
  31. 154
  32. 186
  33. 189
  34. 240
  35. 206
  36. 306
  37. 139
  38. 164
  39. 206
  40. 214

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