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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 812 · 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. 1.33 + 59 + 82 + 60 =
  2. 2.66 + 44 + 17 + 24 =
  3. 3.35 + 25 + 16 + 77 =
  4. 4.65 + 89 + 31 + 72 =
  5. 5.51 + 78 + 66 + 23 =
  6. 6.24 + 46 + 28 + 48 =
  7. 7.84 + 33 + 36 + 57 =
  8. 8.79 + 72 + 83 + 20 =
  9. 9.69 + 42 + 78 + 80 =
  10. 10.88 + 57 + 49 + 16 =
  11. 11.77 + 78 + 51 + 88 =
  12. 12.21 + 43 + 36 + 21 =
  13. 13.17 + 23 + 55 + 84 =
  14. 14.61 + 34 + 12 + 60 =
  15. 15.30 + 49 + 36 + 35 =
  16. 16.41 + 13 + 29 + 50 =
  17. 17.86 + 17 + 49 + 50 =
  18. 18.89 + 13 + 71 + 18 =
  19. 19.67 + 29 + 85 + 75 =
  20. 20.68 + 67 + 41 + 16 =
  21. 21.37 + 41 + 14 + 19 =
  22. 22.71 + 21 + 17 + 16 =
  23. 23.51 + 26 + 27 + 66 =
  24. 24.79 + 28 + 51 + 84 =
  25. 25.69 + 58 + 24 + 61 =
  26. 26.33 + 47 + 44 + 36 =
  27. 27.11 + 47 + 39 + 38 =
  28. 28.27 + 85 + 34 + 89 =
  29. 29.14 + 75 + 29 + 65 =
  30. 30.67 + 59 + 79 + 52 =
  31. 31.29 + 73 + 28 + 59 =
  32. 32.62 + 31 + 88 + 46 =
  33. 33.56 + 78 + 16 + 15 =
  34. 34.86 + 62 + 44 + 85 =
  35. 35.88 + 43 + 59 + 64 =
  36. 36.42 + 46 + 14 + 35 =
  37. 37.65 + 56 + 21 + 62 =
  38. 38.88 + 54 + 38 + 49 =
  39. 39.50 + 66 + 33 + 56 =
  40. 40.58 + 81 + 40 + 15 =

Answer key

  1. 234
  2. 151
  3. 153
  4. 257
  5. 218
  6. 146
  7. 210
  8. 254
  9. 269
  10. 210
  11. 294
  12. 121
  13. 179
  14. 167
  15. 150
  16. 133
  17. 202
  18. 191
  19. 256
  20. 192
  21. 111
  22. 125
  23. 170
  24. 242
  25. 212
  26. 160
  27. 135
  28. 235
  29. 183
  30. 257
  31. 189
  32. 227
  33. 165
  34. 277
  35. 254
  36. 137
  37. 204
  38. 229
  39. 205
  40. 194

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