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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 926 · 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. 1.50 + 69 + 17 + 33 =
  2. 2.47 + 68 + 27 + 42 =
  3. 3.74 + 21 + 17 + 42 =
  4. 4.74 + 37 + 38 + 50 =
  5. 5.79 + 38 + 56 + 13 =
  6. 6.13 + 17 + 57 + 58 =
  7. 7.33 + 46 + 42 + 47 =
  8. 8.80 + 21 + 67 + 12 =
  9. 9.71 + 30 + 61 + 19 =
  10. 10.16 + 88 + 64 + 60 =
  11. 11.75 + 26 + 17 + 43 =
  12. 12.66 + 50 + 27 + 24 =
  13. 13.88 + 16 + 55 + 62 =
  14. 14.49 + 28 + 45 + 32 =
  15. 15.66 + 85 + 55 + 64 =
  16. 16.43 + 64 + 82 + 26 =
  17. 17.81 + 89 + 35 + 59 =
  18. 18.87 + 12 + 83 + 74 =
  19. 19.47 + 14 + 14 + 30 =
  20. 20.32 + 66 + 15 + 58 =
  21. 21.31 + 25 + 49 + 68 =
  22. 22.48 + 74 + 19 + 42 =
  23. 23.85 + 51 + 16 + 53 =
  24. 24.66 + 12 + 83 + 22 =
  25. 25.78 + 19 + 84 + 48 =
  26. 26.22 + 16 + 12 + 30 =
  27. 27.50 + 37 + 16 + 44 =
  28. 28.40 + 47 + 84 + 85 =
  29. 29.58 + 26 + 17 + 62 =
  30. 30.67 + 80 + 73 + 68 =
  31. 31.43 + 67 + 21 + 39 =
  32. 32.35 + 37 + 88 + 73 =
  33. 33.47 + 89 + 43 + 60 =
  34. 34.56 + 25 + 35 + 35 =
  35. 35.20 + 82 + 38 + 32 =
  36. 36.73 + 50 + 15 + 43 =
  37. 37.32 + 33 + 16 + 42 =
  38. 38.55 + 30 + 88 + 28 =
  39. 39.67 + 36 + 17 + 21 =
  40. 40.89 + 18 + 62 + 23 =

Answer key

  1. 169
  2. 184
  3. 154
  4. 199
  5. 186
  6. 145
  7. 168
  8. 180
  9. 181
  10. 228
  11. 161
  12. 167
  13. 221
  14. 154
  15. 270
  16. 215
  17. 264
  18. 256
  19. 105
  20. 171
  21. 173
  22. 183
  23. 205
  24. 183
  25. 229
  26. 80
  27. 147
  28. 256
  29. 163
  30. 288
  31. 170
  32. 233
  33. 239
  34. 151
  35. 172
  36. 181
  37. 123
  38. 201
  39. 141
  40. 192

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