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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 847 · 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 + 73 + 51 + 58 =
  2. 2.66 + 31 + 55 + 73 =
  3. 3.68 + 20 + 23 + 83 =
  4. 4.28 + 13 + 53 + 26 =
  5. 5.65 + 89 + 22 + 24 =
  6. 6.21 + 84 + 21 + 34 =
  7. 7.79 + 11 + 46 + 49 =
  8. 8.55 + 81 + 50 + 61 =
  9. 9.78 + 30 + 48 + 16 =
  10. 10.44 + 35 + 68 + 71 =
  11. 11.49 + 38 + 59 + 34 =
  12. 12.71 + 16 + 11 + 20 =
  13. 13.44 + 34 + 59 + 76 =
  14. 14.61 + 45 + 73 + 86 =
  15. 15.18 + 73 + 67 + 74 =
  16. 16.62 + 88 + 22 + 49 =
  17. 17.75 + 60 + 66 + 62 =
  18. 18.26 + 45 + 86 + 71 =
  19. 19.54 + 24 + 22 + 29 =
  20. 20.12 + 15 + 33 + 69 =
  21. 21.28 + 12 + 49 + 85 =
  22. 22.17 + 81 + 63 + 12 =
  23. 23.20 + 40 + 71 + 69 =
  24. 24.13 + 19 + 50 + 80 =
  25. 25.17 + 40 + 29 + 23 =
  26. 26.68 + 82 + 22 + 77 =
  27. 27.54 + 88 + 43 + 36 =
  28. 28.77 + 83 + 74 + 82 =
  29. 29.36 + 38 + 27 + 39 =
  30. 30.84 + 23 + 27 + 49 =
  31. 31.18 + 69 + 43 + 19 =
  32. 32.74 + 29 + 88 + 19 =
  33. 33.75 + 13 + 59 + 52 =
  34. 34.14 + 46 + 33 + 19 =
  35. 35.75 + 61 + 65 + 25 =
  36. 36.48 + 32 + 81 + 66 =
  37. 37.25 + 41 + 57 + 15 =
  38. 38.11 + 17 + 50 + 52 =
  39. 39.67 + 67 + 63 + 25 =
  40. 40.15 + 34 + 34 + 25 =

Answer key

  1. 263
  2. 225
  3. 194
  4. 120
  5. 200
  6. 160
  7. 185
  8. 247
  9. 172
  10. 218
  11. 180
  12. 118
  13. 213
  14. 265
  15. 232
  16. 221
  17. 263
  18. 228
  19. 129
  20. 129
  21. 174
  22. 173
  23. 200
  24. 162
  25. 109
  26. 249
  27. 221
  28. 316
  29. 140
  30. 183
  31. 149
  32. 210
  33. 199
  34. 112
  35. 226
  36. 227
  37. 138
  38. 130
  39. 222
  40. 108

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