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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 857 · 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. 1.35 + 73 + 24 + 38 =
  2. 2.38 + 83 + 22 + 30 =
  3. 3.59 + 75 + 39 + 46 =
  4. 4.33 + 31 + 89 + 88 =
  5. 5.24 + 83 + 84 + 22 =
  6. 6.18 + 45 + 23 + 35 =
  7. 7.46 + 42 + 60 + 31 =
  8. 8.16 + 54 + 73 + 44 =
  9. 9.35 + 49 + 20 + 33 =
  10. 10.16 + 18 + 52 + 65 =
  11. 11.62 + 72 + 82 + 42 =
  12. 12.25 + 57 + 39 + 78 =
  13. 13.79 + 17 + 30 + 21 =
  14. 14.42 + 74 + 41 + 44 =
  15. 15.39 + 59 + 39 + 23 =
  16. 16.18 + 25 + 70 + 85 =
  17. 17.27 + 61 + 57 + 32 =
  18. 18.15 + 20 + 21 + 47 =
  19. 19.56 + 80 + 31 + 65 =
  20. 20.28 + 45 + 57 + 38 =
  21. 21.17 + 78 + 88 + 53 =
  22. 22.86 + 34 + 79 + 31 =
  23. 23.18 + 68 + 56 + 86 =
  24. 24.11 + 13 + 88 + 37 =
  25. 25.35 + 73 + 20 + 72 =
  26. 26.79 + 59 + 15 + 44 =
  27. 27.46 + 31 + 46 + 39 =
  28. 28.81 + 39 + 71 + 31 =
  29. 29.21 + 23 + 66 + 37 =
  30. 30.11 + 80 + 30 + 56 =
  31. 31.81 + 76 + 89 + 22 =
  32. 32.44 + 17 + 48 + 66 =
  33. 33.56 + 14 + 46 + 56 =
  34. 34.41 + 76 + 53 + 58 =
  35. 35.13 + 76 + 73 + 31 =
  36. 36.46 + 62 + 31 + 14 =
  37. 37.70 + 72 + 42 + 41 =
  38. 38.60 + 21 + 76 + 11 =
  39. 39.80 + 31 + 74 + 79 =
  40. 40.67 + 78 + 85 + 86 =

Answer key

  1. 170
  2. 173
  3. 219
  4. 241
  5. 213
  6. 121
  7. 179
  8. 187
  9. 137
  10. 151
  11. 258
  12. 199
  13. 147
  14. 201
  15. 160
  16. 198
  17. 177
  18. 103
  19. 232
  20. 168
  21. 236
  22. 230
  23. 228
  24. 149
  25. 200
  26. 197
  27. 162
  28. 222
  29. 147
  30. 177
  31. 268
  32. 175
  33. 172
  34. 228
  35. 193
  36. 153
  37. 225
  38. 168
  39. 264
  40. 316

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