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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 807 · 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. 1.66 + 80 + 83 + 27 =
  2. 2.19 + 38 + 43 + 31 =
  3. 3.70 + 28 + 77 + 40 =
  4. 4.45 + 22 + 33 + 53 =
  5. 5.36 + 41 + 84 + 56 =
  6. 6.53 + 38 + 37 + 83 =
  7. 7.45 + 29 + 17 + 60 =
  8. 8.81 + 74 + 76 + 38 =
  9. 9.73 + 22 + 72 + 64 =
  10. 10.85 + 29 + 88 + 56 =
  11. 11.75 + 16 + 27 + 77 =
  12. 12.20 + 45 + 52 + 86 =
  13. 13.30 + 64 + 87 + 74 =
  14. 14.17 + 50 + 21 + 52 =
  15. 15.82 + 31 + 64 + 54 =
  16. 16.81 + 48 + 74 + 73 =
  17. 17.26 + 88 + 69 + 55 =
  18. 18.20 + 89 + 13 + 15 =
  19. 19.36 + 29 + 68 + 56 =
  20. 20.85 + 25 + 61 + 40 =
  21. 21.31 + 25 + 56 + 42 =
  22. 22.71 + 80 + 79 + 26 =
  23. 23.49 + 76 + 68 + 29 =
  24. 24.88 + 65 + 69 + 26 =
  25. 25.22 + 57 + 87 + 11 =
  26. 26.62 + 34 + 83 + 28 =
  27. 27.26 + 38 + 29 + 43 =
  28. 28.67 + 32 + 21 + 16 =
  29. 29.15 + 82 + 23 + 13 =
  30. 30.50 + 33 + 37 + 54 =
  31. 31.34 + 55 + 40 + 35 =
  32. 32.38 + 20 + 11 + 24 =
  33. 33.39 + 21 + 12 + 59 =
  34. 34.33 + 11 + 42 + 86 =
  35. 35.54 + 55 + 67 + 20 =
  36. 36.37 + 87 + 63 + 47 =
  37. 37.70 + 26 + 71 + 11 =
  38. 38.43 + 77 + 42 + 57 =
  39. 39.42 + 75 + 18 + 52 =
  40. 40.23 + 81 + 31 + 86 =

Answer key

  1. 256
  2. 131
  3. 215
  4. 153
  5. 217
  6. 211
  7. 151
  8. 269
  9. 231
  10. 258
  11. 195
  12. 203
  13. 255
  14. 140
  15. 231
  16. 276
  17. 238
  18. 137
  19. 189
  20. 211
  21. 154
  22. 256
  23. 222
  24. 248
  25. 177
  26. 207
  27. 136
  28. 136
  29. 133
  30. 174
  31. 164
  32. 93
  33. 131
  34. 172
  35. 196
  36. 234
  37. 178
  38. 219
  39. 187
  40. 221

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