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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 392 · 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. 1.35 + 70 + 70 + 67 =
  2. 2.18 + 78 + 24 + 86 =
  3. 3.75 + 63 + 46 + 13 =
  4. 4.58 + 52 + 76 + 67 =
  5. 5.80 + 85 + 74 + 48 =
  6. 6.76 + 89 + 52 + 18 =
  7. 7.78 + 41 + 21 + 80 =
  8. 8.40 + 77 + 44 + 14 =
  9. 9.87 + 58 + 70 + 80 =
  10. 10.20 + 70 + 52 + 57 =
  11. 11.57 + 50 + 84 + 88 =
  12. 12.32 + 63 + 14 + 47 =
  13. 13.47 + 75 + 88 + 28 =
  14. 14.84 + 56 + 45 + 21 =
  15. 15.79 + 16 + 86 + 59 =
  16. 16.30 + 61 + 15 + 44 =
  17. 17.29 + 63 + 26 + 32 =
  18. 18.25 + 71 + 30 + 57 =
  19. 19.20 + 19 + 66 + 40 =
  20. 20.46 + 14 + 11 + 15 =
  21. 21.37 + 49 + 54 + 65 =
  22. 22.17 + 16 + 69 + 42 =
  23. 23.61 + 17 + 62 + 40 =
  24. 24.39 + 40 + 62 + 39 =
  25. 25.70 + 88 + 45 + 32 =
  26. 26.82 + 64 + 27 + 46 =
  27. 27.77 + 27 + 59 + 12 =
  28. 28.18 + 51 + 28 + 75 =
  29. 29.14 + 11 + 26 + 17 =
  30. 30.79 + 72 + 48 + 87 =
  31. 31.16 + 16 + 59 + 48 =
  32. 32.47 + 16 + 69 + 28 =
  33. 33.86 + 14 + 17 + 27 =
  34. 34.82 + 50 + 44 + 48 =
  35. 35.42 + 80 + 16 + 18 =
  36. 36.13 + 30 + 28 + 12 =
  37. 37.72 + 11 + 56 + 62 =
  38. 38.37 + 48 + 67 + 55 =
  39. 39.74 + 61 + 41 + 42 =
  40. 40.81 + 67 + 21 + 18 =

Answer key

  1. 242
  2. 206
  3. 197
  4. 253
  5. 287
  6. 235
  7. 220
  8. 175
  9. 295
  10. 199
  11. 279
  12. 156
  13. 238
  14. 206
  15. 240
  16. 150
  17. 150
  18. 183
  19. 145
  20. 86
  21. 205
  22. 144
  23. 180
  24. 180
  25. 235
  26. 219
  27. 175
  28. 172
  29. 68
  30. 286
  31. 139
  32. 160
  33. 144
  34. 224
  35. 156
  36. 83
  37. 201
  38. 207
  39. 218
  40. 187

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