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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 923 · 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 + 76 + 30 + 17 =
  2. 2.46 + 59 + 35 + 28 =
  3. 3.76 + 17 + 15 + 31 =
  4. 4.29 + 80 + 58 + 52 =
  5. 5.21 + 51 + 15 + 12 =
  6. 6.14 + 64 + 26 + 42 =
  7. 7.39 + 37 + 58 + 53 =
  8. 8.80 + 50 + 39 + 13 =
  9. 9.23 + 28 + 18 + 81 =
  10. 10.77 + 14 + 48 + 11 =
  11. 11.37 + 14 + 82 + 37 =
  12. 12.86 + 79 + 20 + 17 =
  13. 13.74 + 46 + 21 + 29 =
  14. 14.24 + 26 + 60 + 69 =
  15. 15.73 + 57 + 45 + 48 =
  16. 16.84 + 29 + 19 + 66 =
  17. 17.60 + 59 + 85 + 17 =
  18. 18.68 + 12 + 55 + 85 =
  19. 19.59 + 62 + 40 + 82 =
  20. 20.65 + 15 + 40 + 50 =
  21. 21.82 + 27 + 26 + 72 =
  22. 22.65 + 84 + 17 + 32 =
  23. 23.43 + 60 + 65 + 13 =
  24. 24.39 + 59 + 62 + 82 =
  25. 25.31 + 24 + 41 + 81 =
  26. 26.62 + 29 + 50 + 31 =
  27. 27.17 + 18 + 24 + 85 =
  28. 28.72 + 58 + 59 + 56 =
  29. 29.59 + 18 + 51 + 11 =
  30. 30.35 + 40 + 50 + 25 =
  31. 31.86 + 21 + 13 + 80 =
  32. 32.44 + 11 + 41 + 48 =
  33. 33.54 + 54 + 15 + 26 =
  34. 34.49 + 53 + 83 + 65 =
  35. 35.61 + 88 + 80 + 70 =
  36. 36.58 + 37 + 60 + 28 =
  37. 37.51 + 86 + 89 + 32 =
  38. 38.64 + 83 + 75 + 74 =
  39. 39.15 + 63 + 31 + 15 =
  40. 40.25 + 36 + 39 + 71 =

Answer key

  1. 171
  2. 168
  3. 139
  4. 219
  5. 99
  6. 146
  7. 187
  8. 182
  9. 150
  10. 150
  11. 170
  12. 202
  13. 170
  14. 179
  15. 223
  16. 198
  17. 221
  18. 220
  19. 243
  20. 170
  21. 207
  22. 198
  23. 181
  24. 242
  25. 177
  26. 172
  27. 144
  28. 245
  29. 139
  30. 150
  31. 200
  32. 144
  33. 149
  34. 250
  35. 299
  36. 183
  37. 258
  38. 296
  39. 124
  40. 171

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