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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 41 · 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. 1.27 + 66 + 76 + 75 =
  2. 2.64 + 67 + 29 + 87 =
  3. 3.21 + 64 + 70 + 86 =
  4. 4.24 + 47 + 51 + 84 =
  5. 5.36 + 67 + 67 + 17 =
  6. 6.64 + 49 + 70 + 16 =
  7. 7.68 + 34 + 29 + 50 =
  8. 8.79 + 75 + 45 + 41 =
  9. 9.60 + 71 + 33 + 71 =
  10. 10.17 + 85 + 53 + 44 =
  11. 11.31 + 71 + 19 + 75 =
  12. 12.30 + 47 + 67 + 14 =
  13. 13.65 + 86 + 52 + 75 =
  14. 14.60 + 31 + 71 + 61 =
  15. 15.73 + 46 + 72 + 21 =
  16. 16.18 + 78 + 80 + 18 =
  17. 17.15 + 69 + 87 + 34 =
  18. 18.73 + 77 + 29 + 82 =
  19. 19.76 + 56 + 17 + 18 =
  20. 20.73 + 54 + 46 + 78 =
  21. 21.58 + 66 + 18 + 76 =
  22. 22.77 + 60 + 11 + 15 =
  23. 23.53 + 29 + 59 + 36 =
  24. 24.19 + 28 + 57 + 83 =
  25. 25.49 + 40 + 26 + 82 =
  26. 26.56 + 79 + 14 + 26 =
  27. 27.17 + 60 + 24 + 56 =
  28. 28.27 + 45 + 13 + 35 =
  29. 29.78 + 15 + 38 + 39 =
  30. 30.41 + 21 + 78 + 79 =
  31. 31.82 + 25 + 81 + 51 =
  32. 32.79 + 12 + 65 + 52 =
  33. 33.46 + 74 + 55 + 23 =
  34. 34.68 + 51 + 14 + 77 =
  35. 35.27 + 11 + 63 + 30 =
  36. 36.66 + 11 + 55 + 20 =
  37. 37.52 + 32 + 46 + 83 =
  38. 38.69 + 41 + 89 + 48 =
  39. 39.18 + 51 + 61 + 83 =
  40. 40.17 + 34 + 56 + 88 =

Answer key

  1. 244
  2. 247
  3. 241
  4. 206
  5. 187
  6. 199
  7. 181
  8. 240
  9. 235
  10. 199
  11. 196
  12. 158
  13. 278
  14. 223
  15. 212
  16. 194
  17. 205
  18. 261
  19. 167
  20. 251
  21. 218
  22. 163
  23. 177
  24. 187
  25. 197
  26. 175
  27. 157
  28. 120
  29. 170
  30. 219
  31. 239
  32. 208
  33. 198
  34. 210
  35. 131
  36. 152
  37. 213
  38. 247
  39. 213
  40. 195

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