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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 158 · 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. 1.43 + 27 + 11 + 78 =
  2. 2.58 + 17 + 74 + 66 =
  3. 3.40 + 46 + 33 + 51 =
  4. 4.33 + 80 + 49 + 88 =
  5. 5.27 + 50 + 37 + 33 =
  6. 6.87 + 88 + 71 + 87 =
  7. 7.54 + 51 + 85 + 55 =
  8. 8.50 + 12 + 67 + 80 =
  9. 9.67 + 29 + 86 + 62 =
  10. 10.66 + 34 + 11 + 26 =
  11. 11.65 + 28 + 23 + 49 =
  12. 12.48 + 67 + 60 + 25 =
  13. 13.73 + 75 + 37 + 56 =
  14. 14.37 + 81 + 48 + 76 =
  15. 15.82 + 77 + 20 + 29 =
  16. 16.59 + 11 + 21 + 12 =
  17. 17.21 + 16 + 51 + 77 =
  18. 18.67 + 58 + 41 + 26 =
  19. 19.24 + 16 + 27 + 30 =
  20. 20.32 + 79 + 67 + 29 =
  21. 21.59 + 52 + 59 + 19 =
  22. 22.69 + 58 + 24 + 41 =
  23. 23.48 + 21 + 81 + 48 =
  24. 24.67 + 69 + 55 + 66 =
  25. 25.81 + 80 + 54 + 37 =
  26. 26.51 + 63 + 26 + 83 =
  27. 27.62 + 29 + 38 + 26 =
  28. 28.73 + 14 + 73 + 61 =
  29. 29.21 + 54 + 67 + 80 =
  30. 30.48 + 22 + 50 + 83 =
  31. 31.48 + 69 + 21 + 19 =
  32. 32.25 + 28 + 54 + 39 =
  33. 33.32 + 33 + 13 + 23 =
  34. 34.69 + 38 + 58 + 75 =
  35. 35.11 + 62 + 65 + 28 =
  36. 36.13 + 20 + 36 + 37 =
  37. 37.24 + 30 + 23 + 87 =
  38. 38.32 + 84 + 70 + 62 =
  39. 39.84 + 60 + 14 + 83 =
  40. 40.65 + 16 + 52 + 42 =

Answer key

  1. 159
  2. 215
  3. 170
  4. 250
  5. 147
  6. 333
  7. 245
  8. 209
  9. 244
  10. 137
  11. 165
  12. 200
  13. 241
  14. 242
  15. 208
  16. 103
  17. 165
  18. 192
  19. 97
  20. 207
  21. 189
  22. 192
  23. 198
  24. 257
  25. 252
  26. 223
  27. 155
  28. 221
  29. 222
  30. 203
  31. 157
  32. 146
  33. 101
  34. 240
  35. 166
  36. 106
  37. 164
  38. 248
  39. 241
  40. 175

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