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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 410 · 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. 1.33 + 14 + 41 + 61 =
  2. 2.71 + 15 + 41 + 17 =
  3. 3.30 + 88 + 54 + 49 =
  4. 4.26 + 54 + 29 + 21 =
  5. 5.77 + 23 + 70 + 24 =
  6. 6.64 + 56 + 82 + 87 =
  7. 7.24 + 66 + 60 + 75 =
  8. 8.19 + 37 + 27 + 44 =
  9. 9.69 + 25 + 34 + 37 =
  10. 10.75 + 47 + 14 + 59 =
  11. 11.73 + 25 + 42 + 18 =
  12. 12.23 + 24 + 38 + 66 =
  13. 13.57 + 83 + 45 + 61 =
  14. 14.67 + 51 + 74 + 12 =
  15. 15.45 + 86 + 89 + 57 =
  16. 16.81 + 21 + 80 + 15 =
  17. 17.23 + 30 + 14 + 43 =
  18. 18.77 + 78 + 18 + 81 =
  19. 19.18 + 25 + 54 + 61 =
  20. 20.47 + 37 + 52 + 56 =
  21. 21.81 + 83 + 29 + 11 =
  22. 22.25 + 25 + 13 + 29 =
  23. 23.11 + 57 + 47 + 35 =
  24. 24.36 + 12 + 45 + 37 =
  25. 25.43 + 28 + 53 + 78 =
  26. 26.58 + 71 + 44 + 29 =
  27. 27.19 + 67 + 40 + 41 =
  28. 28.39 + 66 + 15 + 74 =
  29. 29.82 + 80 + 62 + 39 =
  30. 30.58 + 45 + 64 + 40 =
  31. 31.88 + 77 + 60 + 20 =
  32. 32.48 + 40 + 60 + 64 =
  33. 33.88 + 76 + 81 + 68 =
  34. 34.42 + 13 + 47 + 85 =
  35. 35.75 + 44 + 38 + 13 =
  36. 36.64 + 23 + 67 + 48 =
  37. 37.41 + 73 + 24 + 38 =
  38. 38.70 + 47 + 30 + 56 =
  39. 39.33 + 52 + 87 + 47 =
  40. 40.87 + 23 + 50 + 28 =

Answer key

  1. 149
  2. 144
  3. 221
  4. 130
  5. 194
  6. 289
  7. 225
  8. 127
  9. 165
  10. 195
  11. 158
  12. 151
  13. 246
  14. 204
  15. 277
  16. 197
  17. 110
  18. 254
  19. 158
  20. 192
  21. 204
  22. 92
  23. 150
  24. 130
  25. 202
  26. 202
  27. 167
  28. 194
  29. 263
  30. 207
  31. 245
  32. 212
  33. 313
  34. 187
  35. 170
  36. 202
  37. 176
  38. 203
  39. 219
  40. 188

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