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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 995 · 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. 1.73 + 84 + 60 + 46 =
  2. 2.70 + 25 + 55 + 75 =
  3. 3.40 + 37 + 11 + 22 =
  4. 4.35 + 12 + 28 + 34 =
  5. 5.21 + 24 + 78 + 15 =
  6. 6.25 + 26 + 15 + 60 =
  7. 7.72 + 40 + 24 + 35 =
  8. 8.17 + 35 + 19 + 27 =
  9. 9.11 + 70 + 65 + 63 =
  10. 10.66 + 67 + 79 + 78 =
  11. 11.29 + 37 + 85 + 81 =
  12. 12.65 + 50 + 18 + 59 =
  13. 13.24 + 30 + 83 + 88 =
  14. 14.80 + 47 + 32 + 69 =
  15. 15.85 + 69 + 25 + 31 =
  16. 16.29 + 25 + 11 + 13 =
  17. 17.35 + 68 + 54 + 36 =
  18. 18.80 + 18 + 69 + 72 =
  19. 19.87 + 47 + 51 + 46 =
  20. 20.69 + 83 + 12 + 12 =
  21. 21.23 + 59 + 35 + 36 =
  22. 22.33 + 55 + 46 + 61 =
  23. 23.40 + 47 + 28 + 66 =
  24. 24.52 + 43 + 88 + 35 =
  25. 25.48 + 11 + 14 + 45 =
  26. 26.55 + 51 + 37 + 64 =
  27. 27.69 + 64 + 87 + 79 =
  28. 28.85 + 60 + 39 + 84 =
  29. 29.89 + 85 + 42 + 12 =
  30. 30.79 + 14 + 46 + 16 =
  31. 31.86 + 40 + 34 + 30 =
  32. 32.14 + 77 + 37 + 53 =
  33. 33.12 + 16 + 32 + 68 =
  34. 34.63 + 31 + 86 + 29 =
  35. 35.47 + 83 + 16 + 64 =
  36. 36.89 + 14 + 54 + 38 =
  37. 37.54 + 31 + 17 + 67 =
  38. 38.17 + 55 + 82 + 77 =
  39. 39.20 + 31 + 28 + 21 =
  40. 40.55 + 20 + 56 + 29 =

Answer key

  1. 263
  2. 225
  3. 110
  4. 109
  5. 138
  6. 126
  7. 171
  8. 98
  9. 209
  10. 290
  11. 232
  12. 192
  13. 225
  14. 228
  15. 210
  16. 78
  17. 193
  18. 239
  19. 231
  20. 176
  21. 153
  22. 195
  23. 181
  24. 218
  25. 118
  26. 207
  27. 299
  28. 268
  29. 228
  30. 155
  31. 190
  32. 181
  33. 128
  34. 209
  35. 210
  36. 195
  37. 169
  38. 231
  39. 100
  40. 160

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