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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 880 · 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. 1.35 + 19 + 15 + 12 =
  2. 2.21 + 34 + 36 + 25 =
  3. 3.36 + 70 + 13 + 35 =
  4. 4.77 + 32 + 79 + 67 =
  5. 5.22 + 56 + 31 + 63 =
  6. 6.42 + 51 + 27 + 32 =
  7. 7.32 + 50 + 82 + 53 =
  8. 8.34 + 38 + 42 + 79 =
  9. 9.26 + 57 + 45 + 24 =
  10. 10.77 + 64 + 33 + 11 =
  11. 11.77 + 51 + 77 + 43 =
  12. 12.64 + 19 + 25 + 77 =
  13. 13.74 + 62 + 14 + 25 =
  14. 14.80 + 20 + 58 + 63 =
  15. 15.49 + 20 + 18 + 36 =
  16. 16.19 + 41 + 43 + 14 =
  17. 17.26 + 36 + 54 + 48 =
  18. 18.64 + 46 + 41 + 54 =
  19. 19.28 + 67 + 12 + 21 =
  20. 20.17 + 74 + 87 + 32 =
  21. 21.25 + 45 + 89 + 35 =
  22. 22.47 + 31 + 26 + 78 =
  23. 23.21 + 89 + 75 + 67 =
  24. 24.29 + 62 + 43 + 32 =
  25. 25.48 + 85 + 23 + 17 =
  26. 26.89 + 78 + 76 + 65 =
  27. 27.53 + 72 + 26 + 64 =
  28. 28.20 + 13 + 82 + 87 =
  29. 29.18 + 41 + 53 + 88 =
  30. 30.41 + 50 + 35 + 13 =
  31. 31.60 + 47 + 12 + 27 =
  32. 32.36 + 53 + 25 + 62 =
  33. 33.84 + 33 + 20 + 83 =
  34. 34.81 + 28 + 66 + 68 =
  35. 35.87 + 69 + 51 + 51 =
  36. 36.68 + 56 + 49 + 35 =
  37. 37.18 + 54 + 58 + 17 =
  38. 38.56 + 27 + 83 + 42 =
  39. 39.43 + 61 + 34 + 13 =
  40. 40.82 + 39 + 48 + 47 =

Answer key

  1. 81
  2. 116
  3. 154
  4. 255
  5. 172
  6. 152
  7. 217
  8. 193
  9. 152
  10. 185
  11. 248
  12. 185
  13. 175
  14. 221
  15. 123
  16. 117
  17. 164
  18. 205
  19. 128
  20. 210
  21. 194
  22. 182
  23. 252
  24. 166
  25. 173
  26. 308
  27. 215
  28. 202
  29. 200
  30. 139
  31. 146
  32. 176
  33. 220
  34. 243
  35. 258
  36. 208
  37. 147
  38. 208
  39. 151
  40. 216

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