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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 939 · 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. 1.42 + 44 + 29 + 19 =
  2. 2.14 + 31 + 26 + 49 =
  3. 3.72 + 66 + 25 + 11 =
  4. 4.86 + 25 + 74 + 56 =
  5. 5.11 + 49 + 81 + 77 =
  6. 6.74 + 16 + 68 + 27 =
  7. 7.61 + 47 + 62 + 34 =
  8. 8.57 + 68 + 42 + 38 =
  9. 9.49 + 58 + 83 + 41 =
  10. 10.84 + 22 + 84 + 12 =
  11. 11.14 + 21 + 22 + 18 =
  12. 12.28 + 27 + 62 + 63 =
  13. 13.82 + 53 + 33 + 19 =
  14. 14.33 + 79 + 58 + 39 =
  15. 15.12 + 31 + 26 + 53 =
  16. 16.82 + 88 + 21 + 11 =
  17. 17.89 + 54 + 77 + 58 =
  18. 18.30 + 17 + 33 + 79 =
  19. 19.63 + 16 + 32 + 72 =
  20. 20.24 + 55 + 63 + 52 =
  21. 21.23 + 87 + 29 + 88 =
  22. 22.14 + 13 + 31 + 20 =
  23. 23.47 + 32 + 82 + 82 =
  24. 24.12 + 59 + 21 + 74 =
  25. 25.30 + 28 + 46 + 63 =
  26. 26.23 + 60 + 52 + 59 =
  27. 27.11 + 57 + 74 + 87 =
  28. 28.73 + 18 + 59 + 46 =
  29. 29.71 + 76 + 80 + 85 =
  30. 30.31 + 47 + 41 + 23 =
  31. 31.47 + 68 + 64 + 63 =
  32. 32.60 + 34 + 64 + 76 =
  33. 33.47 + 36 + 79 + 28 =
  34. 34.56 + 61 + 45 + 72 =
  35. 35.27 + 11 + 23 + 82 =
  36. 36.34 + 71 + 58 + 87 =
  37. 37.31 + 29 + 69 + 62 =
  38. 38.34 + 57 + 74 + 55 =
  39. 39.35 + 12 + 88 + 63 =
  40. 40.89 + 56 + 45 + 51 =

Answer key

  1. 134
  2. 120
  3. 174
  4. 241
  5. 218
  6. 185
  7. 204
  8. 205
  9. 231
  10. 202
  11. 75
  12. 180
  13. 187
  14. 209
  15. 122
  16. 202
  17. 278
  18. 159
  19. 183
  20. 194
  21. 227
  22. 78
  23. 243
  24. 166
  25. 167
  26. 194
  27. 229
  28. 196
  29. 312
  30. 142
  31. 242
  32. 234
  33. 190
  34. 234
  35. 143
  36. 250
  37. 191
  38. 220
  39. 198
  40. 241

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