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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 891 · 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. 1.64 + 77 + 80 + 57 =
  2. 2.87 + 52 + 72 + 65 =
  3. 3.22 + 88 + 35 + 21 =
  4. 4.19 + 46 + 46 + 46 =
  5. 5.72 + 40 + 15 + 19 =
  6. 6.76 + 18 + 87 + 35 =
  7. 7.66 + 56 + 41 + 29 =
  8. 8.24 + 42 + 17 + 18 =
  9. 9.20 + 40 + 11 + 89 =
  10. 10.87 + 65 + 23 + 44 =
  11. 11.17 + 73 + 84 + 47 =
  12. 12.57 + 82 + 47 + 53 =
  13. 13.38 + 42 + 13 + 25 =
  14. 14.19 + 50 + 46 + 44 =
  15. 15.33 + 43 + 88 + 11 =
  16. 16.12 + 61 + 36 + 15 =
  17. 17.32 + 73 + 42 + 28 =
  18. 18.13 + 30 + 35 + 55 =
  19. 19.39 + 80 + 32 + 72 =
  20. 20.44 + 23 + 14 + 44 =
  21. 21.49 + 34 + 74 + 84 =
  22. 22.25 + 36 + 67 + 45 =
  23. 23.44 + 30 + 21 + 36 =
  24. 24.56 + 66 + 89 + 27 =
  25. 25.74 + 64 + 44 + 39 =
  26. 26.11 + 45 + 80 + 53 =
  27. 27.35 + 76 + 76 + 22 =
  28. 28.54 + 65 + 87 + 32 =
  29. 29.13 + 17 + 33 + 39 =
  30. 30.41 + 62 + 88 + 24 =
  31. 31.65 + 22 + 17 + 35 =
  32. 32.19 + 67 + 87 + 50 =
  33. 33.20 + 61 + 78 + 58 =
  34. 34.50 + 21 + 70 + 29 =
  35. 35.46 + 19 + 13 + 13 =
  36. 36.77 + 40 + 57 + 63 =
  37. 37.56 + 83 + 80 + 48 =
  38. 38.55 + 69 + 79 + 62 =
  39. 39.57 + 14 + 33 + 66 =
  40. 40.45 + 45 + 80 + 48 =

Answer key

  1. 278
  2. 276
  3. 166
  4. 157
  5. 146
  6. 216
  7. 192
  8. 101
  9. 160
  10. 219
  11. 221
  12. 239
  13. 118
  14. 159
  15. 175
  16. 124
  17. 175
  18. 133
  19. 223
  20. 125
  21. 241
  22. 173
  23. 131
  24. 238
  25. 221
  26. 189
  27. 209
  28. 238
  29. 102
  30. 215
  31. 139
  32. 223
  33. 217
  34. 170
  35. 91
  36. 237
  37. 267
  38. 265
  39. 170
  40. 218

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