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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 35 · 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. 1.67 + 52 + 77 + 31 =
  2. 2.57 + 19 + 40 + 84 =
  3. 3.30 + 36 + 59 + 59 =
  4. 4.29 + 46 + 21 + 32 =
  5. 5.33 + 21 + 23 + 87 =
  6. 6.89 + 45 + 79 + 16 =
  7. 7.38 + 29 + 82 + 39 =
  8. 8.46 + 49 + 69 + 34 =
  9. 9.29 + 78 + 20 + 73 =
  10. 10.86 + 76 + 86 + 80 =
  11. 11.12 + 31 + 79 + 33 =
  12. 12.45 + 19 + 11 + 23 =
  13. 13.26 + 45 + 33 + 54 =
  14. 14.49 + 75 + 51 + 50 =
  15. 15.28 + 33 + 12 + 14 =
  16. 16.18 + 79 + 21 + 77 =
  17. 17.46 + 55 + 63 + 63 =
  18. 18.33 + 17 + 68 + 43 =
  19. 19.79 + 50 + 11 + 16 =
  20. 20.59 + 48 + 37 + 27 =
  21. 21.51 + 21 + 71 + 35 =
  22. 22.34 + 17 + 53 + 76 =
  23. 23.12 + 63 + 78 + 35 =
  24. 24.42 + 63 + 57 + 51 =
  25. 25.56 + 76 + 83 + 71 =
  26. 26.65 + 19 + 52 + 46 =
  27. 27.33 + 82 + 51 + 32 =
  28. 28.45 + 89 + 14 + 71 =
  29. 29.78 + 57 + 19 + 78 =
  30. 30.30 + 84 + 75 + 48 =
  31. 31.85 + 22 + 65 + 77 =
  32. 32.65 + 40 + 86 + 47 =
  33. 33.19 + 31 + 40 + 33 =
  34. 34.35 + 14 + 32 + 55 =
  35. 35.69 + 38 + 14 + 83 =
  36. 36.78 + 50 + 29 + 38 =
  37. 37.41 + 64 + 59 + 80 =
  38. 38.82 + 72 + 25 + 54 =
  39. 39.15 + 55 + 82 + 34 =
  40. 40.71 + 30 + 27 + 41 =

Answer key

  1. 227
  2. 200
  3. 184
  4. 128
  5. 164
  6. 229
  7. 188
  8. 198
  9. 200
  10. 328
  11. 155
  12. 98
  13. 158
  14. 225
  15. 87
  16. 195
  17. 227
  18. 161
  19. 156
  20. 171
  21. 178
  22. 180
  23. 188
  24. 213
  25. 286
  26. 182
  27. 198
  28. 219
  29. 232
  30. 237
  31. 249
  32. 238
  33. 123
  34. 136
  35. 204
  36. 195
  37. 244
  38. 233
  39. 186
  40. 169

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