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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 845 · 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. 1.81 + 67 + 16 + 79 =
  2. 2.24 + 64 + 87 + 48 =
  3. 3.26 + 56 + 56 + 13 =
  4. 4.51 + 55 + 47 + 12 =
  5. 5.74 + 14 + 34 + 56 =
  6. 6.39 + 26 + 79 + 11 =
  7. 7.28 + 40 + 38 + 80 =
  8. 8.45 + 63 + 66 + 55 =
  9. 9.68 + 42 + 15 + 50 =
  10. 10.12 + 62 + 54 + 33 =
  11. 11.26 + 51 + 36 + 46 =
  12. 12.38 + 20 + 70 + 39 =
  13. 13.74 + 47 + 57 + 60 =
  14. 14.80 + 24 + 72 + 61 =
  15. 15.29 + 35 + 52 + 13 =
  16. 16.54 + 48 + 11 + 77 =
  17. 17.62 + 64 + 20 + 85 =
  18. 18.75 + 55 + 27 + 32 =
  19. 19.51 + 19 + 19 + 58 =
  20. 20.53 + 29 + 31 + 63 =
  21. 21.43 + 27 + 25 + 34 =
  22. 22.68 + 47 + 76 + 61 =
  23. 23.66 + 22 + 80 + 67 =
  24. 24.56 + 28 + 38 + 73 =
  25. 25.31 + 28 + 74 + 58 =
  26. 26.75 + 66 + 36 + 83 =
  27. 27.12 + 46 + 52 + 76 =
  28. 28.59 + 44 + 87 + 88 =
  29. 29.85 + 44 + 33 + 75 =
  30. 30.27 + 15 + 21 + 69 =
  31. 31.11 + 57 + 49 + 40 =
  32. 32.16 + 82 + 51 + 14 =
  33. 33.19 + 83 + 89 + 40 =
  34. 34.30 + 36 + 26 + 72 =
  35. 35.54 + 32 + 27 + 15 =
  36. 36.25 + 74 + 15 + 29 =
  37. 37.73 + 43 + 80 + 27 =
  38. 38.30 + 72 + 86 + 72 =
  39. 39.61 + 89 + 44 + 47 =
  40. 40.51 + 30 + 40 + 81 =

Answer key

  1. 243
  2. 223
  3. 151
  4. 165
  5. 178
  6. 155
  7. 186
  8. 229
  9. 175
  10. 161
  11. 159
  12. 167
  13. 238
  14. 237
  15. 129
  16. 190
  17. 231
  18. 189
  19. 147
  20. 176
  21. 129
  22. 252
  23. 235
  24. 195
  25. 191
  26. 260
  27. 186
  28. 278
  29. 237
  30. 132
  31. 157
  32. 163
  33. 231
  34. 164
  35. 128
  36. 143
  37. 223
  38. 260
  39. 241
  40. 202

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