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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 841 · 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. 1.80 + 57 + 31 + 29 =
  2. 2.28 + 21 + 63 + 40 =
  3. 3.45 + 28 + 53 + 38 =
  4. 4.56 + 32 + 48 + 47 =
  5. 5.19 + 33 + 83 + 14 =
  6. 6.71 + 89 + 11 + 36 =
  7. 7.28 + 76 + 71 + 82 =
  8. 8.11 + 17 + 74 + 72 =
  9. 9.41 + 55 + 20 + 25 =
  10. 10.44 + 14 + 17 + 13 =
  11. 11.16 + 29 + 31 + 58 =
  12. 12.39 + 21 + 13 + 45 =
  13. 13.13 + 65 + 78 + 48 =
  14. 14.41 + 44 + 65 + 51 =
  15. 15.12 + 21 + 77 + 21 =
  16. 16.80 + 34 + 22 + 39 =
  17. 17.51 + 43 + 62 + 55 =
  18. 18.11 + 47 + 42 + 21 =
  19. 19.49 + 49 + 17 + 60 =
  20. 20.76 + 48 + 13 + 12 =
  21. 21.44 + 74 + 72 + 60 =
  22. 22.53 + 58 + 72 + 74 =
  23. 23.85 + 86 + 84 + 35 =
  24. 24.34 + 32 + 79 + 43 =
  25. 25.47 + 72 + 87 + 35 =
  26. 26.22 + 75 + 78 + 55 =
  27. 27.51 + 85 + 59 + 37 =
  28. 28.17 + 88 + 27 + 22 =
  29. 29.79 + 81 + 42 + 65 =
  30. 30.22 + 27 + 27 + 74 =
  31. 31.74 + 42 + 78 + 14 =
  32. 32.49 + 66 + 42 + 28 =
  33. 33.51 + 13 + 30 + 24 =
  34. 34.70 + 37 + 23 + 22 =
  35. 35.16 + 17 + 23 + 29 =
  36. 36.74 + 28 + 35 + 13 =
  37. 37.64 + 66 + 27 + 67 =
  38. 38.64 + 48 + 86 + 66 =
  39. 39.37 + 37 + 25 + 41 =
  40. 40.83 + 30 + 70 + 32 =

Answer key

  1. 197
  2. 152
  3. 164
  4. 183
  5. 149
  6. 207
  7. 257
  8. 174
  9. 141
  10. 88
  11. 134
  12. 118
  13. 204
  14. 201
  15. 131
  16. 175
  17. 211
  18. 121
  19. 175
  20. 149
  21. 250
  22. 257
  23. 290
  24. 188
  25. 241
  26. 230
  27. 232
  28. 154
  29. 267
  30. 150
  31. 208
  32. 185
  33. 118
  34. 152
  35. 85
  36. 150
  37. 224
  38. 264
  39. 140
  40. 215

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