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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 870 · 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. 1.76 + 36 + 51 + 79 =
  2. 2.63 + 22 + 73 + 26 =
  3. 3.32 + 82 + 41 + 72 =
  4. 4.60 + 32 + 72 + 86 =
  5. 5.32 + 63 + 65 + 35 =
  6. 6.77 + 51 + 12 + 87 =
  7. 7.61 + 27 + 57 + 79 =
  8. 8.44 + 75 + 11 + 25 =
  9. 9.85 + 60 + 66 + 71 =
  10. 10.64 + 45 + 84 + 81 =
  11. 11.42 + 14 + 78 + 67 =
  12. 12.30 + 69 + 88 + 23 =
  13. 13.39 + 39 + 78 + 63 =
  14. 14.12 + 47 + 22 + 31 =
  15. 15.61 + 43 + 57 + 82 =
  16. 16.43 + 60 + 54 + 28 =
  17. 17.84 + 23 + 39 + 59 =
  18. 18.71 + 30 + 45 + 74 =
  19. 19.13 + 73 + 32 + 37 =
  20. 20.22 + 48 + 35 + 55 =
  21. 21.86 + 66 + 15 + 81 =
  22. 22.26 + 84 + 54 + 54 =
  23. 23.62 + 67 + 71 + 19 =
  24. 24.63 + 54 + 53 + 82 =
  25. 25.48 + 17 + 14 + 11 =
  26. 26.77 + 63 + 31 + 87 =
  27. 27.67 + 33 + 51 + 34 =
  28. 28.61 + 30 + 54 + 88 =
  29. 29.17 + 11 + 16 + 22 =
  30. 30.23 + 78 + 70 + 17 =
  31. 31.40 + 75 + 31 + 11 =
  32. 32.89 + 67 + 11 + 40 =
  33. 33.78 + 34 + 69 + 78 =
  34. 34.27 + 36 + 22 + 36 =
  35. 35.35 + 15 + 51 + 49 =
  36. 36.24 + 68 + 35 + 52 =
  37. 37.16 + 83 + 64 + 49 =
  38. 38.69 + 83 + 25 + 12 =
  39. 39.23 + 27 + 12 + 72 =
  40. 40.21 + 16 + 79 + 35 =

Answer key

  1. 242
  2. 184
  3. 227
  4. 250
  5. 195
  6. 227
  7. 224
  8. 155
  9. 282
  10. 274
  11. 201
  12. 210
  13. 219
  14. 112
  15. 243
  16. 185
  17. 205
  18. 220
  19. 155
  20. 160
  21. 248
  22. 218
  23. 219
  24. 252
  25. 90
  26. 258
  27. 185
  28. 233
  29. 66
  30. 188
  31. 157
  32. 207
  33. 259
  34. 121
  35. 150
  36. 179
  37. 212
  38. 189
  39. 134
  40. 151

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