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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 806 · 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 + 29 + 46 + 46 =
  2. 2.85 + 44 + 67 + 14 =
  3. 3.13 + 37 + 16 + 42 =
  4. 4.25 + 86 + 31 + 71 =
  5. 5.70 + 24 + 15 + 25 =
  6. 6.30 + 69 + 73 + 74 =
  7. 7.61 + 11 + 61 + 41 =
  8. 8.79 + 65 + 26 + 78 =
  9. 9.31 + 33 + 32 + 13 =
  10. 10.38 + 82 + 16 + 81 =
  11. 11.81 + 18 + 63 + 15 =
  12. 12.16 + 26 + 24 + 89 =
  13. 13.86 + 45 + 56 + 81 =
  14. 14.69 + 31 + 55 + 54 =
  15. 15.62 + 15 + 82 + 57 =
  16. 16.61 + 77 + 26 + 68 =
  17. 17.79 + 57 + 13 + 65 =
  18. 18.56 + 78 + 89 + 61 =
  19. 19.68 + 63 + 60 + 79 =
  20. 20.12 + 77 + 35 + 29 =
  21. 21.38 + 58 + 86 + 27 =
  22. 22.23 + 76 + 36 + 23 =
  23. 23.61 + 30 + 56 + 30 =
  24. 24.17 + 65 + 17 + 51 =
  25. 25.84 + 19 + 27 + 11 =
  26. 26.59 + 23 + 39 + 74 =
  27. 27.34 + 23 + 14 + 14 =
  28. 28.71 + 70 + 33 + 81 =
  29. 29.66 + 79 + 17 + 47 =
  30. 30.71 + 55 + 51 + 19 =
  31. 31.54 + 24 + 75 + 27 =
  32. 32.58 + 25 + 51 + 12 =
  33. 33.16 + 21 + 26 + 78 =
  34. 34.17 + 68 + 43 + 83 =
  35. 35.14 + 87 + 53 + 54 =
  36. 36.22 + 54 + 68 + 31 =
  37. 37.61 + 37 + 70 + 49 =
  38. 38.32 + 35 + 53 + 77 =
  39. 39.69 + 23 + 66 + 25 =
  40. 40.76 + 58 + 62 + 34 =

Answer key

  1. 195
  2. 210
  3. 108
  4. 213
  5. 134
  6. 246
  7. 174
  8. 248
  9. 109
  10. 217
  11. 177
  12. 155
  13. 268
  14. 209
  15. 216
  16. 232
  17. 214
  18. 284
  19. 270
  20. 153
  21. 209
  22. 158
  23. 177
  24. 150
  25. 141
  26. 195
  27. 85
  28. 255
  29. 209
  30. 196
  31. 180
  32. 146
  33. 141
  34. 211
  35. 208
  36. 175
  37. 217
  38. 197
  39. 183
  40. 230

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