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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 549 · 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. 1.30 + 89 + 22 + 84 =
  2. 2.70 + 25 + 71 + 82 =
  3. 3.59 + 80 + 29 + 66 =
  4. 4.68 + 19 + 13 + 26 =
  5. 5.75 + 14 + 71 + 20 =
  6. 6.63 + 79 + 82 + 48 =
  7. 7.45 + 69 + 55 + 12 =
  8. 8.81 + 62 + 79 + 72 =
  9. 9.30 + 17 + 63 + 56 =
  10. 10.63 + 27 + 56 + 41 =
  11. 11.69 + 20 + 64 + 36 =
  12. 12.86 + 30 + 37 + 53 =
  13. 13.76 + 23 + 75 + 49 =
  14. 14.88 + 52 + 15 + 88 =
  15. 15.23 + 49 + 25 + 44 =
  16. 16.13 + 66 + 89 + 89 =
  17. 17.65 + 34 + 33 + 46 =
  18. 18.76 + 46 + 17 + 56 =
  19. 19.47 + 21 + 30 + 85 =
  20. 20.49 + 52 + 62 + 20 =
  21. 21.81 + 35 + 58 + 59 =
  22. 22.77 + 32 + 18 + 11 =
  23. 23.74 + 56 + 34 + 31 =
  24. 24.27 + 33 + 84 + 85 =
  25. 25.66 + 71 + 46 + 35 =
  26. 26.44 + 45 + 60 + 75 =
  27. 27.32 + 18 + 49 + 32 =
  28. 28.41 + 46 + 87 + 44 =
  29. 29.40 + 89 + 12 + 75 =
  30. 30.62 + 80 + 45 + 33 =
  31. 31.60 + 48 + 16 + 83 =
  32. 32.31 + 80 + 88 + 64 =
  33. 33.21 + 21 + 85 + 78 =
  34. 34.59 + 47 + 71 + 84 =
  35. 35.72 + 17 + 11 + 67 =
  36. 36.21 + 53 + 39 + 65 =
  37. 37.72 + 43 + 19 + 83 =
  38. 38.27 + 39 + 17 + 85 =
  39. 39.63 + 33 + 54 + 30 =
  40. 40.42 + 51 + 31 + 15 =

Answer key

  1. 225
  2. 248
  3. 234
  4. 126
  5. 180
  6. 272
  7. 181
  8. 294
  9. 166
  10. 187
  11. 189
  12. 206
  13. 223
  14. 243
  15. 141
  16. 257
  17. 178
  18. 195
  19. 183
  20. 183
  21. 233
  22. 138
  23. 195
  24. 229
  25. 218
  26. 224
  27. 131
  28. 218
  29. 216
  30. 220
  31. 207
  32. 263
  33. 205
  34. 261
  35. 167
  36. 178
  37. 217
  38. 168
  39. 180
  40. 139

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