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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 931 · 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 + 16 + 17 + 26 =
  2. 2.33 + 15 + 31 + 59 =
  3. 3.14 + 42 + 35 + 34 =
  4. 4.26 + 77 + 61 + 17 =
  5. 5.58 + 77 + 72 + 17 =
  6. 6.21 + 30 + 45 + 46 =
  7. 7.17 + 72 + 75 + 33 =
  8. 8.40 + 28 + 52 + 61 =
  9. 9.53 + 45 + 35 + 74 =
  10. 10.13 + 60 + 85 + 72 =
  11. 11.73 + 43 + 81 + 76 =
  12. 12.22 + 60 + 44 + 44 =
  13. 13.25 + 18 + 67 + 65 =
  14. 14.26 + 49 + 78 + 17 =
  15. 15.16 + 56 + 54 + 47 =
  16. 16.66 + 42 + 67 + 38 =
  17. 17.17 + 35 + 43 + 23 =
  18. 18.77 + 48 + 67 + 15 =
  19. 19.15 + 40 + 77 + 60 =
  20. 20.49 + 30 + 50 + 22 =
  21. 21.33 + 61 + 49 + 37 =
  22. 22.87 + 63 + 12 + 42 =
  23. 23.47 + 48 + 80 + 87 =
  24. 24.60 + 16 + 55 + 71 =
  25. 25.52 + 63 + 70 + 58 =
  26. 26.11 + 86 + 89 + 37 =
  27. 27.43 + 39 + 31 + 29 =
  28. 28.18 + 14 + 13 + 70 =
  29. 29.38 + 76 + 21 + 45 =
  30. 30.82 + 85 + 54 + 37 =
  31. 31.36 + 70 + 88 + 69 =
  32. 32.35 + 66 + 54 + 26 =
  33. 33.38 + 60 + 49 + 24 =
  34. 34.26 + 25 + 80 + 69 =
  35. 35.40 + 61 + 30 + 22 =
  36. 36.29 + 40 + 59 + 47 =
  37. 37.61 + 86 + 47 + 84 =
  38. 38.18 + 26 + 13 + 18 =
  39. 39.38 + 22 + 61 + 71 =
  40. 40.21 + 49 + 30 + 49 =

Answer key

  1. 105
  2. 138
  3. 125
  4. 181
  5. 224
  6. 142
  7. 197
  8. 181
  9. 207
  10. 230
  11. 273
  12. 170
  13. 175
  14. 170
  15. 173
  16. 213
  17. 118
  18. 207
  19. 192
  20. 151
  21. 180
  22. 204
  23. 262
  24. 202
  25. 243
  26. 223
  27. 142
  28. 115
  29. 180
  30. 258
  31. 263
  32. 181
  33. 171
  34. 200
  35. 153
  36. 175
  37. 278
  38. 75
  39. 192
  40. 149

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