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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 499 · 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. 1.73 + 89 + 52 + 14 =
  2. 2.82 + 21 + 25 + 33 =
  3. 3.85 + 40 + 26 + 38 =
  4. 4.82 + 27 + 85 + 79 =
  5. 5.54 + 47 + 58 + 82 =
  6. 6.14 + 40 + 63 + 25 =
  7. 7.11 + 27 + 77 + 21 =
  8. 8.69 + 74 + 65 + 12 =
  9. 9.48 + 31 + 67 + 71 =
  10. 10.65 + 23 + 81 + 82 =
  11. 11.78 + 49 + 15 + 69 =
  12. 12.69 + 20 + 47 + 17 =
  13. 13.61 + 50 + 49 + 86 =
  14. 14.51 + 18 + 46 + 89 =
  15. 15.41 + 75 + 27 + 58 =
  16. 16.41 + 55 + 48 + 43 =
  17. 17.40 + 85 + 55 + 48 =
  18. 18.58 + 64 + 23 + 80 =
  19. 19.33 + 38 + 48 + 40 =
  20. 20.54 + 76 + 84 + 55 =
  21. 21.30 + 30 + 17 + 74 =
  22. 22.34 + 74 + 70 + 66 =
  23. 23.50 + 76 + 63 + 30 =
  24. 24.22 + 41 + 29 + 80 =
  25. 25.83 + 17 + 39 + 73 =
  26. 26.40 + 11 + 23 + 42 =
  27. 27.50 + 33 + 26 + 84 =
  28. 28.11 + 42 + 18 + 84 =
  29. 29.74 + 42 + 18 + 75 =
  30. 30.88 + 75 + 15 + 11 =
  31. 31.31 + 24 + 53 + 47 =
  32. 32.33 + 33 + 15 + 22 =
  33. 33.26 + 88 + 82 + 44 =
  34. 34.72 + 88 + 35 + 17 =
  35. 35.54 + 62 + 64 + 14 =
  36. 36.31 + 45 + 53 + 13 =
  37. 37.12 + 78 + 35 + 81 =
  38. 38.72 + 25 + 85 + 38 =
  39. 39.11 + 76 + 25 + 65 =
  40. 40.32 + 55 + 65 + 56 =

Answer key

  1. 228
  2. 161
  3. 189
  4. 273
  5. 241
  6. 142
  7. 136
  8. 220
  9. 217
  10. 251
  11. 211
  12. 153
  13. 246
  14. 204
  15. 201
  16. 187
  17. 228
  18. 225
  19. 159
  20. 269
  21. 151
  22. 244
  23. 219
  24. 172
  25. 212
  26. 116
  27. 193
  28. 155
  29. 209
  30. 189
  31. 155
  32. 103
  33. 240
  34. 212
  35. 194
  36. 142
  37. 206
  38. 220
  39. 177
  40. 208

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