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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 866 · 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. 1.43 + 85 + 30 + 62 =
  2. 2.31 + 44 + 75 + 24 =
  3. 3.30 + 50 + 40 + 28 =
  4. 4.13 + 78 + 24 + 76 =
  5. 5.11 + 43 + 58 + 78 =
  6. 6.37 + 88 + 46 + 75 =
  7. 7.32 + 55 + 71 + 47 =
  8. 8.16 + 67 + 67 + 53 =
  9. 9.61 + 31 + 30 + 34 =
  10. 10.17 + 53 + 31 + 60 =
  11. 11.16 + 63 + 32 + 62 =
  12. 12.89 + 71 + 84 + 80 =
  13. 13.63 + 51 + 74 + 82 =
  14. 14.30 + 20 + 26 + 55 =
  15. 15.21 + 78 + 41 + 50 =
  16. 16.34 + 47 + 27 + 33 =
  17. 17.28 + 33 + 19 + 52 =
  18. 18.41 + 52 + 39 + 26 =
  19. 19.27 + 31 + 49 + 38 =
  20. 20.29 + 79 + 66 + 21 =
  21. 21.44 + 23 + 65 + 19 =
  22. 22.77 + 28 + 50 + 12 =
  23. 23.50 + 32 + 58 + 79 =
  24. 24.80 + 15 + 45 + 32 =
  25. 25.12 + 67 + 67 + 18 =
  26. 26.89 + 62 + 83 + 40 =
  27. 27.65 + 84 + 87 + 18 =
  28. 28.33 + 53 + 86 + 68 =
  29. 29.26 + 15 + 43 + 41 =
  30. 30.15 + 87 + 34 + 87 =
  31. 31.45 + 64 + 88 + 53 =
  32. 32.51 + 24 + 56 + 86 =
  33. 33.76 + 30 + 79 + 64 =
  34. 34.20 + 13 + 58 + 17 =
  35. 35.49 + 77 + 83 + 75 =
  36. 36.19 + 88 + 57 + 65 =
  37. 37.17 + 26 + 19 + 23 =
  38. 38.63 + 64 + 24 + 89 =
  39. 39.31 + 49 + 36 + 65 =
  40. 40.20 + 81 + 87 + 12 =

Answer key

  1. 220
  2. 174
  3. 148
  4. 191
  5. 190
  6. 246
  7. 205
  8. 203
  9. 156
  10. 161
  11. 173
  12. 324
  13. 270
  14. 131
  15. 190
  16. 141
  17. 132
  18. 158
  19. 145
  20. 195
  21. 151
  22. 167
  23. 219
  24. 172
  25. 164
  26. 274
  27. 254
  28. 240
  29. 125
  30. 223
  31. 250
  32. 217
  33. 249
  34. 108
  35. 284
  36. 229
  37. 85
  38. 240
  39. 181
  40. 200

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