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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 867 · 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. 1.17 + 23 + 84 + 61 =
  2. 2.64 + 73 + 49 + 14 =
  3. 3.29 + 71 + 30 + 62 =
  4. 4.45 + 42 + 50 + 34 =
  5. 5.19 + 82 + 13 + 66 =
  6. 6.55 + 24 + 11 + 35 =
  7. 7.29 + 31 + 40 + 84 =
  8. 8.85 + 34 + 56 + 31 =
  9. 9.78 + 31 + 25 + 84 =
  10. 10.78 + 44 + 80 + 65 =
  11. 11.30 + 65 + 27 + 26 =
  12. 12.62 + 34 + 13 + 57 =
  13. 13.47 + 31 + 41 + 83 =
  14. 14.55 + 32 + 81 + 29 =
  15. 15.51 + 44 + 53 + 83 =
  16. 16.51 + 65 + 12 + 20 =
  17. 17.22 + 82 + 79 + 13 =
  18. 18.58 + 77 + 20 + 21 =
  19. 19.69 + 57 + 43 + 27 =
  20. 20.47 + 24 + 27 + 77 =
  21. 21.53 + 77 + 32 + 50 =
  22. 22.79 + 46 + 12 + 75 =
  23. 23.49 + 67 + 13 + 49 =
  24. 24.46 + 70 + 19 + 75 =
  25. 25.89 + 56 + 48 + 29 =
  26. 26.38 + 29 + 27 + 40 =
  27. 27.70 + 12 + 34 + 42 =
  28. 28.22 + 47 + 51 + 77 =
  29. 29.87 + 27 + 51 + 16 =
  30. 30.73 + 15 + 41 + 60 =
  31. 31.16 + 25 + 32 + 71 =
  32. 32.66 + 48 + 78 + 35 =
  33. 33.47 + 81 + 44 + 45 =
  34. 34.31 + 55 + 67 + 39 =
  35. 35.19 + 36 + 54 + 16 =
  36. 36.58 + 70 + 16 + 28 =
  37. 37.40 + 35 + 62 + 58 =
  38. 38.12 + 55 + 26 + 34 =
  39. 39.89 + 37 + 15 + 56 =
  40. 40.28 + 28 + 11 + 29 =

Answer key

  1. 185
  2. 200
  3. 192
  4. 171
  5. 180
  6. 125
  7. 184
  8. 206
  9. 218
  10. 267
  11. 148
  12. 166
  13. 202
  14. 197
  15. 231
  16. 148
  17. 196
  18. 176
  19. 196
  20. 175
  21. 212
  22. 212
  23. 178
  24. 210
  25. 222
  26. 134
  27. 158
  28. 197
  29. 181
  30. 189
  31. 144
  32. 227
  33. 217
  34. 192
  35. 125
  36. 172
  37. 195
  38. 127
  39. 197
  40. 96

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