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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 249 · 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. 1.78 + 63 + 63 + 17 =
  2. 2.43 + 69 + 79 + 36 =
  3. 3.54 + 73 + 13 + 25 =
  4. 4.25 + 18 + 56 + 32 =
  5. 5.57 + 46 + 19 + 71 =
  6. 6.83 + 36 + 24 + 23 =
  7. 7.82 + 48 + 41 + 25 =
  8. 8.46 + 14 + 63 + 12 =
  9. 9.52 + 36 + 27 + 70 =
  10. 10.14 + 42 + 86 + 56 =
  11. 11.48 + 18 + 45 + 82 =
  12. 12.77 + 33 + 84 + 46 =
  13. 13.57 + 71 + 26 + 55 =
  14. 14.36 + 70 + 25 + 54 =
  15. 15.55 + 50 + 48 + 18 =
  16. 16.59 + 89 + 70 + 82 =
  17. 17.77 + 66 + 46 + 46 =
  18. 18.86 + 14 + 59 + 59 =
  19. 19.25 + 20 + 33 + 17 =
  20. 20.86 + 86 + 82 + 77 =
  21. 21.24 + 21 + 42 + 53 =
  22. 22.26 + 49 + 34 + 32 =
  23. 23.77 + 51 + 56 + 47 =
  24. 24.29 + 25 + 69 + 44 =
  25. 25.70 + 30 + 48 + 60 =
  26. 26.84 + 22 + 39 + 22 =
  27. 27.33 + 78 + 69 + 80 =
  28. 28.54 + 88 + 42 + 62 =
  29. 29.57 + 36 + 65 + 34 =
  30. 30.64 + 89 + 14 + 31 =
  31. 31.49 + 26 + 47 + 72 =
  32. 32.77 + 81 + 65 + 19 =
  33. 33.82 + 72 + 14 + 28 =
  34. 34.11 + 27 + 39 + 47 =
  35. 35.78 + 59 + 81 + 21 =
  36. 36.57 + 27 + 77 + 12 =
  37. 37.30 + 73 + 59 + 46 =
  38. 38.12 + 52 + 42 + 68 =
  39. 39.26 + 56 + 62 + 30 =
  40. 40.45 + 34 + 66 + 38 =

Answer key

  1. 221
  2. 227
  3. 165
  4. 131
  5. 193
  6. 166
  7. 196
  8. 135
  9. 185
  10. 198
  11. 193
  12. 240
  13. 209
  14. 185
  15. 171
  16. 300
  17. 235
  18. 218
  19. 95
  20. 331
  21. 140
  22. 141
  23. 231
  24. 167
  25. 208
  26. 167
  27. 260
  28. 246
  29. 192
  30. 198
  31. 194
  32. 242
  33. 196
  34. 124
  35. 239
  36. 173
  37. 208
  38. 174
  39. 174
  40. 183

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