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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 913 · 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. 1.46 + 19 + 15 + 33 =
  2. 2.26 + 37 + 46 + 53 =
  3. 3.17 + 55 + 73 + 59 =
  4. 4.66 + 33 + 70 + 44 =
  5. 5.84 + 74 + 36 + 19 =
  6. 6.85 + 35 + 40 + 30 =
  7. 7.81 + 48 + 16 + 87 =
  8. 8.25 + 33 + 57 + 37 =
  9. 9.62 + 45 + 80 + 27 =
  10. 10.46 + 38 + 23 + 81 =
  11. 11.67 + 29 + 32 + 57 =
  12. 12.50 + 12 + 87 + 15 =
  13. 13.65 + 67 + 16 + 64 =
  14. 14.32 + 36 + 70 + 52 =
  15. 15.65 + 26 + 32 + 17 =
  16. 16.78 + 29 + 51 + 79 =
  17. 17.85 + 76 + 29 + 50 =
  18. 18.74 + 34 + 62 + 57 =
  19. 19.61 + 23 + 25 + 21 =
  20. 20.40 + 67 + 32 + 15 =
  21. 21.83 + 79 + 65 + 55 =
  22. 22.42 + 17 + 29 + 61 =
  23. 23.71 + 78 + 78 + 66 =
  24. 24.31 + 33 + 11 + 33 =
  25. 25.62 + 72 + 46 + 14 =
  26. 26.54 + 67 + 56 + 71 =
  27. 27.42 + 16 + 67 + 27 =
  28. 28.46 + 20 + 74 + 15 =
  29. 29.47 + 61 + 75 + 21 =
  30. 30.75 + 17 + 50 + 57 =
  31. 31.36 + 14 + 87 + 67 =
  32. 32.32 + 13 + 67 + 82 =
  33. 33.32 + 26 + 51 + 39 =
  34. 34.57 + 87 + 65 + 58 =
  35. 35.65 + 37 + 14 + 51 =
  36. 36.21 + 11 + 83 + 32 =
  37. 37.69 + 66 + 13 + 84 =
  38. 38.88 + 51 + 86 + 33 =
  39. 39.57 + 74 + 46 + 21 =
  40. 40.88 + 56 + 28 + 69 =

Answer key

  1. 113
  2. 162
  3. 204
  4. 213
  5. 213
  6. 190
  7. 232
  8. 152
  9. 214
  10. 188
  11. 185
  12. 164
  13. 212
  14. 190
  15. 140
  16. 237
  17. 240
  18. 227
  19. 130
  20. 154
  21. 282
  22. 149
  23. 293
  24. 108
  25. 194
  26. 248
  27. 152
  28. 155
  29. 204
  30. 199
  31. 204
  32. 194
  33. 148
  34. 267
  35. 167
  36. 147
  37. 232
  38. 258
  39. 198
  40. 241

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