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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 865 · 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. 1.32 + 85 + 36 + 55 =
  2. 2.86 + 32 + 45 + 60 =
  3. 3.12 + 15 + 31 + 51 =
  4. 4.56 + 74 + 57 + 79 =
  5. 5.12 + 52 + 47 + 74 =
  6. 6.66 + 81 + 19 + 40 =
  7. 7.59 + 17 + 19 + 44 =
  8. 8.87 + 15 + 11 + 67 =
  9. 9.63 + 72 + 32 + 65 =
  10. 10.80 + 14 + 20 + 48 =
  11. 11.12 + 20 + 83 + 63 =
  12. 12.24 + 18 + 81 + 47 =
  13. 13.17 + 19 + 82 + 84 =
  14. 14.49 + 50 + 17 + 77 =
  15. 15.18 + 20 + 84 + 62 =
  16. 16.58 + 42 + 38 + 26 =
  17. 17.30 + 20 + 23 + 79 =
  18. 18.41 + 50 + 43 + 43 =
  19. 19.36 + 39 + 61 + 48 =
  20. 20.77 + 28 + 32 + 32 =
  21. 21.27 + 86 + 47 + 88 =
  22. 22.56 + 30 + 83 + 69 =
  23. 23.56 + 33 + 67 + 28 =
  24. 24.18 + 57 + 87 + 74 =
  25. 25.20 + 76 + 27 + 65 =
  26. 26.55 + 48 + 79 + 43 =
  27. 27.71 + 19 + 26 + 23 =
  28. 28.45 + 86 + 61 + 46 =
  29. 29.17 + 36 + 23 + 70 =
  30. 30.18 + 80 + 30 + 89 =
  31. 31.69 + 89 + 47 + 69 =
  32. 32.67 + 82 + 58 + 18 =
  33. 33.84 + 12 + 70 + 32 =
  34. 34.18 + 11 + 29 + 49 =
  35. 35.88 + 63 + 68 + 77 =
  36. 36.15 + 62 + 54 + 80 =
  37. 37.40 + 40 + 39 + 83 =
  38. 38.52 + 24 + 77 + 42 =
  39. 39.23 + 32 + 17 + 28 =
  40. 40.36 + 60 + 65 + 33 =

Answer key

  1. 208
  2. 223
  3. 109
  4. 266
  5. 185
  6. 206
  7. 139
  8. 180
  9. 232
  10. 162
  11. 178
  12. 170
  13. 202
  14. 193
  15. 184
  16. 164
  17. 152
  18. 177
  19. 184
  20. 169
  21. 248
  22. 238
  23. 184
  24. 236
  25. 188
  26. 225
  27. 139
  28. 238
  29. 146
  30. 217
  31. 274
  32. 225
  33. 198
  34. 107
  35. 296
  36. 211
  37. 202
  38. 195
  39. 100
  40. 194

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