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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 980 · 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. 1.65 + 28 + 33 + 78 =
  2. 2.57 + 23 + 62 + 88 =
  3. 3.45 + 84 + 40 + 33 =
  4. 4.50 + 83 + 75 + 26 =
  5. 5.71 + 47 + 18 + 68 =
  6. 6.56 + 59 + 74 + 53 =
  7. 7.76 + 82 + 66 + 32 =
  8. 8.68 + 85 + 12 + 47 =
  9. 9.80 + 63 + 66 + 58 =
  10. 10.69 + 85 + 14 + 41 =
  11. 11.31 + 49 + 12 + 26 =
  12. 12.19 + 31 + 66 + 73 =
  13. 13.13 + 44 + 45 + 61 =
  14. 14.89 + 24 + 62 + 18 =
  15. 15.75 + 16 + 31 + 28 =
  16. 16.43 + 88 + 50 + 33 =
  17. 17.75 + 40 + 35 + 70 =
  18. 18.57 + 34 + 23 + 69 =
  19. 19.62 + 85 + 27 + 37 =
  20. 20.65 + 85 + 83 + 38 =
  21. 21.28 + 75 + 83 + 29 =
  22. 22.45 + 53 + 86 + 31 =
  23. 23.53 + 30 + 40 + 17 =
  24. 24.77 + 15 + 56 + 30 =
  25. 25.39 + 27 + 24 + 12 =
  26. 26.22 + 43 + 83 + 15 =
  27. 27.26 + 58 + 68 + 59 =
  28. 28.20 + 67 + 32 + 33 =
  29. 29.85 + 72 + 20 + 85 =
  30. 30.34 + 18 + 43 + 38 =
  31. 31.82 + 81 + 78 + 69 =
  32. 32.35 + 13 + 72 + 73 =
  33. 33.80 + 84 + 53 + 71 =
  34. 34.29 + 12 + 27 + 24 =
  35. 35.80 + 48 + 66 + 51 =
  36. 36.73 + 20 + 71 + 48 =
  37. 37.13 + 36 + 30 + 26 =
  38. 38.60 + 66 + 51 + 25 =
  39. 39.48 + 73 + 81 + 26 =
  40. 40.57 + 59 + 67 + 41 =

Answer key

  1. 204
  2. 230
  3. 202
  4. 234
  5. 204
  6. 242
  7. 256
  8. 212
  9. 267
  10. 209
  11. 118
  12. 189
  13. 163
  14. 193
  15. 150
  16. 214
  17. 220
  18. 183
  19. 211
  20. 271
  21. 215
  22. 215
  23. 140
  24. 178
  25. 102
  26. 163
  27. 211
  28. 152
  29. 262
  30. 133
  31. 310
  32. 193
  33. 288
  34. 92
  35. 245
  36. 212
  37. 105
  38. 202
  39. 228
  40. 224

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