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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 204 · 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. 1.29 + 81 + 49 + 38 =
  2. 2.70 + 72 + 34 + 70 =
  3. 3.23 + 61 + 39 + 17 =
  4. 4.64 + 44 + 86 + 33 =
  5. 5.57 + 20 + 28 + 22 =
  6. 6.65 + 47 + 26 + 19 =
  7. 7.60 + 58 + 15 + 44 =
  8. 8.15 + 30 + 70 + 22 =
  9. 9.65 + 76 + 68 + 45 =
  10. 10.53 + 26 + 77 + 70 =
  11. 11.23 + 14 + 71 + 26 =
  12. 12.15 + 42 + 79 + 87 =
  13. 13.55 + 13 + 45 + 42 =
  14. 14.22 + 59 + 41 + 29 =
  15. 15.78 + 85 + 65 + 20 =
  16. 16.29 + 28 + 16 + 14 =
  17. 17.49 + 31 + 82 + 46 =
  18. 18.23 + 78 + 75 + 70 =
  19. 19.15 + 54 + 72 + 56 =
  20. 20.35 + 44 + 14 + 58 =
  21. 21.12 + 30 + 44 + 30 =
  22. 22.48 + 84 + 50 + 14 =
  23. 23.59 + 42 + 78 + 82 =
  24. 24.41 + 60 + 13 + 50 =
  25. 25.27 + 22 + 80 + 75 =
  26. 26.11 + 80 + 37 + 55 =
  27. 27.14 + 28 + 58 + 37 =
  28. 28.31 + 69 + 75 + 63 =
  29. 29.12 + 32 + 49 + 64 =
  30. 30.33 + 75 + 11 + 28 =
  31. 31.57 + 18 + 46 + 85 =
  32. 32.29 + 65 + 46 + 69 =
  33. 33.58 + 51 + 14 + 82 =
  34. 34.41 + 18 + 81 + 86 =
  35. 35.11 + 57 + 67 + 58 =
  36. 36.45 + 47 + 32 + 38 =
  37. 37.28 + 31 + 81 + 59 =
  38. 38.71 + 63 + 57 + 21 =
  39. 39.54 + 55 + 40 + 33 =
  40. 40.73 + 38 + 76 + 80 =

Answer key

  1. 197
  2. 246
  3. 140
  4. 227
  5. 127
  6. 157
  7. 177
  8. 137
  9. 254
  10. 226
  11. 134
  12. 223
  13. 155
  14. 151
  15. 248
  16. 87
  17. 208
  18. 246
  19. 197
  20. 151
  21. 116
  22. 196
  23. 261
  24. 164
  25. 204
  26. 183
  27. 137
  28. 238
  29. 157
  30. 147
  31. 206
  32. 209
  33. 205
  34. 226
  35. 193
  36. 162
  37. 199
  38. 212
  39. 182
  40. 267

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