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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 440 · 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. 1.48 + 72 + 78 + 35 =
  2. 2.75 + 23 + 58 + 41 =
  3. 3.78 + 54 + 34 + 17 =
  4. 4.12 + 89 + 78 + 43 =
  5. 5.66 + 66 + 61 + 82 =
  6. 6.21 + 78 + 82 + 64 =
  7. 7.49 + 73 + 13 + 42 =
  8. 8.40 + 89 + 78 + 45 =
  9. 9.77 + 83 + 38 + 50 =
  10. 10.73 + 23 + 33 + 51 =
  11. 11.80 + 16 + 61 + 60 =
  12. 12.69 + 32 + 19 + 29 =
  13. 13.41 + 75 + 29 + 31 =
  14. 14.46 + 39 + 56 + 12 =
  15. 15.59 + 68 + 25 + 89 =
  16. 16.16 + 77 + 15 + 23 =
  17. 17.22 + 47 + 87 + 56 =
  18. 18.15 + 77 + 88 + 17 =
  19. 19.79 + 57 + 81 + 44 =
  20. 20.72 + 31 + 63 + 13 =
  21. 21.31 + 31 + 47 + 32 =
  22. 22.68 + 24 + 85 + 67 =
  23. 23.28 + 73 + 75 + 12 =
  24. 24.73 + 31 + 63 + 23 =
  25. 25.42 + 80 + 31 + 13 =
  26. 26.40 + 73 + 36 + 22 =
  27. 27.57 + 70 + 64 + 20 =
  28. 28.86 + 12 + 49 + 21 =
  29. 29.73 + 85 + 71 + 81 =
  30. 30.17 + 83 + 38 + 77 =
  31. 31.29 + 89 + 49 + 39 =
  32. 32.43 + 72 + 67 + 36 =
  33. 33.48 + 85 + 79 + 52 =
  34. 34.27 + 50 + 29 + 72 =
  35. 35.68 + 13 + 86 + 22 =
  36. 36.30 + 66 + 36 + 81 =
  37. 37.28 + 21 + 27 + 50 =
  38. 38.76 + 44 + 16 + 36 =
  39. 39.44 + 68 + 65 + 45 =
  40. 40.26 + 21 + 12 + 59 =

Answer key

  1. 233
  2. 197
  3. 183
  4. 222
  5. 275
  6. 245
  7. 177
  8. 252
  9. 248
  10. 180
  11. 217
  12. 149
  13. 176
  14. 153
  15. 241
  16. 131
  17. 212
  18. 197
  19. 261
  20. 179
  21. 141
  22. 244
  23. 188
  24. 190
  25. 166
  26. 171
  27. 211
  28. 168
  29. 310
  30. 215
  31. 206
  32. 218
  33. 264
  34. 178
  35. 189
  36. 213
  37. 126
  38. 172
  39. 222
  40. 118

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