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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 414 · 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. 1.70 + 18 + 56 + 75 =
  2. 2.84 + 13 + 26 + 88 =
  3. 3.26 + 33 + 49 + 29 =
  4. 4.19 + 74 + 44 + 69 =
  5. 5.89 + 27 + 62 + 28 =
  6. 6.67 + 80 + 75 + 35 =
  7. 7.40 + 13 + 46 + 56 =
  8. 8.34 + 89 + 33 + 50 =
  9. 9.80 + 67 + 62 + 18 =
  10. 10.19 + 59 + 28 + 59 =
  11. 11.21 + 44 + 62 + 69 =
  12. 12.19 + 28 + 74 + 56 =
  13. 13.30 + 31 + 18 + 18 =
  14. 14.33 + 45 + 58 + 34 =
  15. 15.19 + 18 + 71 + 37 =
  16. 16.35 + 63 + 88 + 66 =
  17. 17.49 + 16 + 42 + 78 =
  18. 18.60 + 60 + 61 + 12 =
  19. 19.12 + 34 + 66 + 31 =
  20. 20.28 + 78 + 24 + 43 =
  21. 21.76 + 87 + 33 + 46 =
  22. 22.46 + 41 + 56 + 19 =
  23. 23.13 + 39 + 53 + 11 =
  24. 24.26 + 65 + 16 + 66 =
  25. 25.53 + 85 + 45 + 28 =
  26. 26.57 + 52 + 61 + 26 =
  27. 27.58 + 49 + 37 + 58 =
  28. 28.41 + 82 + 23 + 54 =
  29. 29.62 + 52 + 42 + 33 =
  30. 30.25 + 17 + 89 + 25 =
  31. 31.72 + 63 + 87 + 42 =
  32. 32.46 + 66 + 19 + 56 =
  33. 33.52 + 21 + 42 + 87 =
  34. 34.87 + 63 + 87 + 22 =
  35. 35.53 + 87 + 13 + 11 =
  36. 36.89 + 35 + 14 + 87 =
  37. 37.18 + 23 + 82 + 62 =
  38. 38.49 + 41 + 49 + 78 =
  39. 39.34 + 17 + 74 + 86 =
  40. 40.11 + 25 + 70 + 58 =

Answer key

  1. 219
  2. 211
  3. 137
  4. 206
  5. 206
  6. 257
  7. 155
  8. 206
  9. 227
  10. 165
  11. 196
  12. 177
  13. 97
  14. 170
  15. 145
  16. 252
  17. 185
  18. 193
  19. 143
  20. 173
  21. 242
  22. 162
  23. 116
  24. 173
  25. 211
  26. 196
  27. 202
  28. 200
  29. 189
  30. 156
  31. 264
  32. 187
  33. 202
  34. 259
  35. 164
  36. 225
  37. 185
  38. 217
  39. 211
  40. 164

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