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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 450 · 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. 1.40 + 79 + 60 + 16 =
  2. 2.45 + 81 + 12 + 61 =
  3. 3.18 + 11 + 51 + 54 =
  4. 4.61 + 87 + 64 + 42 =
  5. 5.64 + 14 + 34 + 53 =
  6. 6.41 + 41 + 77 + 44 =
  7. 7.26 + 49 + 52 + 13 =
  8. 8.61 + 72 + 70 + 22 =
  9. 9.43 + 40 + 79 + 45 =
  10. 10.79 + 23 + 84 + 40 =
  11. 11.34 + 80 + 22 + 41 =
  12. 12.35 + 18 + 47 + 83 =
  13. 13.31 + 34 + 11 + 27 =
  14. 14.85 + 33 + 68 + 27 =
  15. 15.15 + 12 + 30 + 15 =
  16. 16.22 + 59 + 42 + 68 =
  17. 17.53 + 38 + 20 + 73 =
  18. 18.49 + 75 + 59 + 13 =
  19. 19.86 + 21 + 42 + 13 =
  20. 20.22 + 74 + 64 + 77 =
  21. 21.78 + 11 + 89 + 17 =
  22. 22.25 + 30 + 57 + 71 =
  23. 23.56 + 70 + 55 + 59 =
  24. 24.69 + 75 + 42 + 81 =
  25. 25.63 + 26 + 39 + 68 =
  26. 26.19 + 65 + 35 + 33 =
  27. 27.73 + 61 + 26 + 52 =
  28. 28.54 + 25 + 16 + 89 =
  29. 29.49 + 49 + 37 + 30 =
  30. 30.68 + 21 + 81 + 82 =
  31. 31.22 + 42 + 40 + 13 =
  32. 32.63 + 26 + 41 + 11 =
  33. 33.42 + 77 + 68 + 56 =
  34. 34.14 + 28 + 15 + 18 =
  35. 35.36 + 85 + 24 + 41 =
  36. 36.39 + 40 + 38 + 82 =
  37. 37.14 + 54 + 51 + 81 =
  38. 38.73 + 88 + 23 + 77 =
  39. 39.33 + 64 + 42 + 20 =
  40. 40.52 + 56 + 74 + 36 =

Answer key

  1. 195
  2. 199
  3. 134
  4. 254
  5. 165
  6. 203
  7. 140
  8. 225
  9. 207
  10. 226
  11. 177
  12. 183
  13. 103
  14. 213
  15. 72
  16. 191
  17. 184
  18. 196
  19. 162
  20. 237
  21. 195
  22. 183
  23. 240
  24. 267
  25. 196
  26. 152
  27. 212
  28. 184
  29. 165
  30. 252
  31. 117
  32. 141
  33. 243
  34. 75
  35. 186
  36. 199
  37. 200
  38. 261
  39. 159
  40. 218

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