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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 365 · 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. 1.87 + 51 + 73 + 43 =
  2. 2.59 + 78 + 67 + 75 =
  3. 3.34 + 29 + 79 + 33 =
  4. 4.17 + 67 + 22 + 45 =
  5. 5.80 + 59 + 52 + 47 =
  6. 6.11 + 24 + 34 + 23 =
  7. 7.72 + 59 + 75 + 24 =
  8. 8.55 + 23 + 68 + 84 =
  9. 9.20 + 19 + 70 + 24 =
  10. 10.24 + 36 + 84 + 60 =
  11. 11.54 + 26 + 40 + 80 =
  12. 12.53 + 27 + 18 + 20 =
  13. 13.13 + 79 + 41 + 84 =
  14. 14.89 + 57 + 40 + 22 =
  15. 15.62 + 33 + 11 + 21 =
  16. 16.80 + 55 + 86 + 63 =
  17. 17.45 + 74 + 34 + 66 =
  18. 18.34 + 59 + 74 + 16 =
  19. 19.33 + 71 + 33 + 21 =
  20. 20.52 + 31 + 47 + 29 =
  21. 21.59 + 36 + 61 + 75 =
  22. 22.66 + 17 + 81 + 22 =
  23. 23.49 + 16 + 71 + 71 =
  24. 24.62 + 54 + 15 + 67 =
  25. 25.78 + 46 + 28 + 55 =
  26. 26.86 + 70 + 13 + 31 =
  27. 27.23 + 78 + 72 + 86 =
  28. 28.60 + 30 + 75 + 86 =
  29. 29.69 + 56 + 35 + 50 =
  30. 30.89 + 18 + 41 + 18 =
  31. 31.17 + 39 + 12 + 87 =
  32. 32.39 + 25 + 27 + 44 =
  33. 33.66 + 77 + 61 + 22 =
  34. 34.31 + 70 + 40 + 48 =
  35. 35.12 + 44 + 68 + 23 =
  36. 36.58 + 49 + 18 + 67 =
  37. 37.12 + 32 + 54 + 18 =
  38. 38.71 + 13 + 16 + 11 =
  39. 39.79 + 17 + 25 + 52 =
  40. 40.75 + 63 + 50 + 26 =

Answer key

  1. 254
  2. 279
  3. 175
  4. 151
  5. 238
  6. 92
  7. 230
  8. 230
  9. 133
  10. 204
  11. 200
  12. 118
  13. 217
  14. 208
  15. 127
  16. 284
  17. 219
  18. 183
  19. 158
  20. 159
  21. 231
  22. 186
  23. 207
  24. 198
  25. 207
  26. 200
  27. 259
  28. 251
  29. 210
  30. 166
  31. 155
  32. 135
  33. 226
  34. 189
  35. 147
  36. 192
  37. 116
  38. 111
  39. 173
  40. 214

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