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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 255 · 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. 1.61 + 16 + 47 + 49 =
  2. 2.36 + 41 + 65 + 69 =
  3. 3.84 + 74 + 26 + 77 =
  4. 4.59 + 83 + 21 + 82 =
  5. 5.60 + 75 + 51 + 58 =
  6. 6.49 + 62 + 14 + 35 =
  7. 7.56 + 87 + 25 + 13 =
  8. 8.22 + 70 + 76 + 76 =
  9. 9.22 + 30 + 51 + 19 =
  10. 10.25 + 27 + 67 + 20 =
  11. 11.89 + 79 + 18 + 77 =
  12. 12.26 + 88 + 23 + 57 =
  13. 13.33 + 17 + 47 + 75 =
  14. 14.73 + 14 + 18 + 66 =
  15. 15.86 + 25 + 26 + 13 =
  16. 16.25 + 16 + 46 + 19 =
  17. 17.88 + 12 + 81 + 81 =
  18. 18.40 + 62 + 13 + 25 =
  19. 19.85 + 33 + 86 + 71 =
  20. 20.48 + 68 + 17 + 86 =
  21. 21.16 + 45 + 57 + 84 =
  22. 22.70 + 68 + 44 + 31 =
  23. 23.29 + 67 + 33 + 16 =
  24. 24.72 + 34 + 82 + 23 =
  25. 25.78 + 67 + 83 + 15 =
  26. 26.57 + 52 + 80 + 45 =
  27. 27.70 + 39 + 78 + 87 =
  28. 28.66 + 84 + 40 + 31 =
  29. 29.26 + 55 + 68 + 65 =
  30. 30.57 + 16 + 77 + 28 =
  31. 31.84 + 36 + 75 + 28 =
  32. 32.64 + 29 + 13 + 23 =
  33. 33.80 + 36 + 66 + 89 =
  34. 34.78 + 85 + 62 + 51 =
  35. 35.36 + 11 + 27 + 22 =
  36. 36.66 + 80 + 33 + 25 =
  37. 37.45 + 61 + 19 + 13 =
  38. 38.62 + 60 + 26 + 23 =
  39. 39.36 + 16 + 34 + 29 =
  40. 40.56 + 15 + 19 + 89 =

Answer key

  1. 173
  2. 211
  3. 261
  4. 245
  5. 244
  6. 160
  7. 181
  8. 244
  9. 122
  10. 139
  11. 263
  12. 194
  13. 172
  14. 171
  15. 150
  16. 106
  17. 262
  18. 140
  19. 275
  20. 219
  21. 202
  22. 213
  23. 145
  24. 211
  25. 243
  26. 234
  27. 274
  28. 221
  29. 214
  30. 178
  31. 223
  32. 129
  33. 271
  34. 276
  35. 96
  36. 204
  37. 138
  38. 171
  39. 115
  40. 179

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