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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 635 · 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. 1.56 + 32 + 51 + 69 =
  2. 2.71 + 18 + 38 + 45 =
  3. 3.47 + 69 + 55 + 67 =
  4. 4.43 + 89 + 60 + 22 =
  5. 5.86 + 58 + 66 + 46 =
  6. 6.25 + 30 + 31 + 86 =
  7. 7.85 + 34 + 83 + 82 =
  8. 8.14 + 14 + 71 + 85 =
  9. 9.22 + 15 + 76 + 85 =
  10. 10.29 + 84 + 27 + 44 =
  11. 11.28 + 60 + 79 + 20 =
  12. 12.23 + 75 + 74 + 40 =
  13. 13.17 + 58 + 89 + 70 =
  14. 14.89 + 31 + 26 + 47 =
  15. 15.32 + 58 + 29 + 74 =
  16. 16.66 + 77 + 71 + 17 =
  17. 17.84 + 19 + 13 + 33 =
  18. 18.37 + 13 + 41 + 28 =
  19. 19.88 + 24 + 28 + 46 =
  20. 20.58 + 48 + 77 + 61 =
  21. 21.23 + 67 + 78 + 38 =
  22. 22.22 + 22 + 86 + 26 =
  23. 23.32 + 17 + 70 + 37 =
  24. 24.50 + 34 + 87 + 74 =
  25. 25.18 + 14 + 53 + 40 =
  26. 26.22 + 78 + 40 + 33 =
  27. 27.44 + 68 + 75 + 12 =
  28. 28.73 + 71 + 69 + 35 =
  29. 29.41 + 11 + 50 + 87 =
  30. 30.76 + 85 + 16 + 77 =
  31. 31.52 + 65 + 89 + 15 =
  32. 32.27 + 31 + 23 + 77 =
  33. 33.71 + 67 + 20 + 77 =
  34. 34.31 + 56 + 27 + 72 =
  35. 35.35 + 49 + 37 + 29 =
  36. 36.55 + 81 + 83 + 65 =
  37. 37.79 + 34 + 54 + 21 =
  38. 38.78 + 61 + 50 + 29 =
  39. 39.12 + 53 + 62 + 44 =
  40. 40.88 + 80 + 60 + 39 =

Answer key

  1. 208
  2. 172
  3. 238
  4. 214
  5. 256
  6. 172
  7. 284
  8. 184
  9. 198
  10. 184
  11. 187
  12. 212
  13. 234
  14. 193
  15. 193
  16. 231
  17. 149
  18. 119
  19. 186
  20. 244
  21. 206
  22. 156
  23. 156
  24. 245
  25. 125
  26. 173
  27. 199
  28. 248
  29. 189
  30. 254
  31. 221
  32. 158
  33. 235
  34. 186
  35. 150
  36. 284
  37. 188
  38. 218
  39. 171
  40. 267

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