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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 484 · 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. 1.74 + 58 + 49 + 40 =
  2. 2.88 + 57 + 24 + 12 =
  3. 3.51 + 75 + 66 + 71 =
  4. 4.26 + 18 + 47 + 31 =
  5. 5.79 + 22 + 43 + 36 =
  6. 6.44 + 25 + 12 + 42 =
  7. 7.73 + 49 + 72 + 66 =
  8. 8.72 + 42 + 39 + 51 =
  9. 9.21 + 16 + 22 + 34 =
  10. 10.18 + 15 + 35 + 21 =
  11. 11.35 + 82 + 64 + 82 =
  12. 12.41 + 85 + 24 + 87 =
  13. 13.87 + 81 + 73 + 85 =
  14. 14.11 + 28 + 78 + 37 =
  15. 15.15 + 45 + 47 + 24 =
  16. 16.70 + 57 + 12 + 38 =
  17. 17.87 + 78 + 88 + 68 =
  18. 18.47 + 25 + 25 + 83 =
  19. 19.31 + 75 + 55 + 78 =
  20. 20.41 + 57 + 79 + 40 =
  21. 21.65 + 65 + 17 + 86 =
  22. 22.14 + 59 + 23 + 14 =
  23. 23.16 + 72 + 33 + 25 =
  24. 24.82 + 84 + 55 + 49 =
  25. 25.37 + 78 + 70 + 65 =
  26. 26.28 + 66 + 13 + 81 =
  27. 27.80 + 12 + 84 + 32 =
  28. 28.31 + 44 + 59 + 67 =
  29. 29.63 + 17 + 73 + 19 =
  30. 30.88 + 48 + 58 + 33 =
  31. 31.65 + 74 + 45 + 39 =
  32. 32.64 + 81 + 26 + 73 =
  33. 33.84 + 22 + 68 + 42 =
  34. 34.18 + 63 + 79 + 21 =
  35. 35.42 + 77 + 38 + 25 =
  36. 36.34 + 45 + 21 + 37 =
  37. 37.63 + 19 + 22 + 25 =
  38. 38.50 + 66 + 63 + 75 =
  39. 39.76 + 25 + 83 + 68 =
  40. 40.78 + 73 + 27 + 75 =

Answer key

  1. 221
  2. 181
  3. 263
  4. 122
  5. 180
  6. 123
  7. 260
  8. 204
  9. 93
  10. 89
  11. 263
  12. 237
  13. 326
  14. 154
  15. 131
  16. 177
  17. 321
  18. 180
  19. 239
  20. 217
  21. 233
  22. 110
  23. 146
  24. 270
  25. 250
  26. 188
  27. 208
  28. 201
  29. 172
  30. 227
  31. 223
  32. 244
  33. 216
  34. 181
  35. 182
  36. 137
  37. 129
  38. 254
  39. 252
  40. 253

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