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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 470 · 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. 1.45 + 73 + 39 + 27 =
  2. 2.48 + 62 + 28 + 25 =
  3. 3.74 + 11 + 42 + 73 =
  4. 4.15 + 43 + 23 + 83 =
  5. 5.24 + 15 + 63 + 16 =
  6. 6.44 + 17 + 51 + 49 =
  7. 7.40 + 80 + 73 + 26 =
  8. 8.17 + 71 + 89 + 49 =
  9. 9.61 + 27 + 55 + 61 =
  10. 10.82 + 31 + 74 + 70 =
  11. 11.26 + 81 + 43 + 46 =
  12. 12.65 + 55 + 50 + 32 =
  13. 13.62 + 34 + 16 + 30 =
  14. 14.13 + 28 + 65 + 73 =
  15. 15.12 + 87 + 41 + 21 =
  16. 16.50 + 34 + 16 + 38 =
  17. 17.76 + 14 + 14 + 68 =
  18. 18.33 + 88 + 16 + 82 =
  19. 19.66 + 56 + 58 + 32 =
  20. 20.16 + 84 + 33 + 24 =
  21. 21.37 + 50 + 53 + 86 =
  22. 22.41 + 80 + 80 + 76 =
  23. 23.13 + 24 + 18 + 16 =
  24. 24.79 + 86 + 37 + 36 =
  25. 25.54 + 17 + 13 + 53 =
  26. 26.84 + 77 + 25 + 48 =
  27. 27.50 + 87 + 22 + 24 =
  28. 28.84 + 72 + 81 + 76 =
  29. 29.32 + 87 + 18 + 20 =
  30. 30.65 + 60 + 68 + 74 =
  31. 31.40 + 39 + 30 + 42 =
  32. 32.55 + 72 + 28 + 31 =
  33. 33.72 + 27 + 30 + 74 =
  34. 34.34 + 71 + 11 + 40 =
  35. 35.35 + 50 + 23 + 78 =
  36. 36.86 + 61 + 89 + 16 =
  37. 37.70 + 24 + 21 + 70 =
  38. 38.28 + 69 + 38 + 78 =
  39. 39.13 + 84 + 25 + 41 =
  40. 40.19 + 18 + 69 + 14 =

Answer key

  1. 184
  2. 163
  3. 200
  4. 164
  5. 118
  6. 161
  7. 219
  8. 226
  9. 204
  10. 257
  11. 196
  12. 202
  13. 142
  14. 179
  15. 161
  16. 138
  17. 172
  18. 219
  19. 212
  20. 157
  21. 226
  22. 277
  23. 71
  24. 238
  25. 137
  26. 234
  27. 183
  28. 313
  29. 157
  30. 267
  31. 151
  32. 186
  33. 203
  34. 156
  35. 186
  36. 252
  37. 185
  38. 213
  39. 163
  40. 120

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