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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 725 · 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. 1.25 + 27 + 63 + 20 =
  2. 2.85 + 43 + 58 + 47 =
  3. 3.82 + 62 + 89 + 20 =
  4. 4.45 + 82 + 79 + 78 =
  5. 5.29 + 48 + 84 + 72 =
  6. 6.48 + 29 + 56 + 59 =
  7. 7.81 + 48 + 83 + 46 =
  8. 8.44 + 45 + 11 + 80 =
  9. 9.81 + 34 + 70 + 40 =
  10. 10.80 + 74 + 14 + 58 =
  11. 11.21 + 53 + 87 + 56 =
  12. 12.13 + 18 + 86 + 48 =
  13. 13.87 + 53 + 22 + 28 =
  14. 14.11 + 73 + 34 + 62 =
  15. 15.38 + 54 + 33 + 12 =
  16. 16.82 + 83 + 34 + 39 =
  17. 17.21 + 71 + 77 + 79 =
  18. 18.66 + 62 + 21 + 36 =
  19. 19.33 + 61 + 20 + 76 =
  20. 20.40 + 23 + 15 + 67 =
  21. 21.58 + 60 + 22 + 40 =
  22. 22.65 + 24 + 57 + 33 =
  23. 23.11 + 53 + 74 + 47 =
  24. 24.43 + 68 + 33 + 74 =
  25. 25.28 + 67 + 81 + 41 =
  26. 26.55 + 86 + 73 + 49 =
  27. 27.13 + 50 + 48 + 15 =
  28. 28.53 + 71 + 18 + 31 =
  29. 29.51 + 20 + 68 + 75 =
  30. 30.49 + 78 + 70 + 89 =
  31. 31.80 + 39 + 61 + 12 =
  32. 32.39 + 22 + 49 + 63 =
  33. 33.84 + 45 + 22 + 11 =
  34. 34.59 + 34 + 85 + 38 =
  35. 35.16 + 33 + 78 + 30 =
  36. 36.33 + 67 + 20 + 72 =
  37. 37.26 + 44 + 55 + 16 =
  38. 38.37 + 65 + 79 + 63 =
  39. 39.75 + 59 + 88 + 88 =
  40. 40.32 + 66 + 33 + 18 =

Answer key

  1. 135
  2. 233
  3. 253
  4. 284
  5. 233
  6. 192
  7. 258
  8. 180
  9. 225
  10. 226
  11. 217
  12. 165
  13. 190
  14. 180
  15. 137
  16. 238
  17. 248
  18. 185
  19. 190
  20. 145
  21. 180
  22. 179
  23. 185
  24. 218
  25. 217
  26. 263
  27. 126
  28. 173
  29. 214
  30. 286
  31. 192
  32. 173
  33. 162
  34. 216
  35. 157
  36. 192
  37. 141
  38. 244
  39. 310
  40. 149

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