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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 843 · 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. 1.84 + 12 + 16 + 36 =
  2. 2.26 + 12 + 33 + 31 =
  3. 3.77 + 25 + 51 + 72 =
  4. 4.55 + 37 + 28 + 45 =
  5. 5.26 + 63 + 87 + 30 =
  6. 6.78 + 65 + 71 + 51 =
  7. 7.12 + 43 + 17 + 28 =
  8. 8.19 + 38 + 17 + 78 =
  9. 9.56 + 68 + 85 + 50 =
  10. 10.34 + 54 + 41 + 15 =
  11. 11.63 + 14 + 35 + 83 =
  12. 12.26 + 82 + 16 + 16 =
  13. 13.79 + 61 + 85 + 81 =
  14. 14.38 + 39 + 31 + 27 =
  15. 15.13 + 85 + 51 + 17 =
  16. 16.86 + 77 + 79 + 72 =
  17. 17.34 + 17 + 23 + 50 =
  18. 18.67 + 20 + 46 + 16 =
  19. 19.80 + 67 + 58 + 28 =
  20. 20.70 + 19 + 14 + 48 =
  21. 21.51 + 48 + 43 + 26 =
  22. 22.64 + 30 + 45 + 60 =
  23. 23.76 + 25 + 23 + 80 =
  24. 24.61 + 82 + 30 + 50 =
  25. 25.73 + 27 + 22 + 73 =
  26. 26.60 + 22 + 13 + 45 =
  27. 27.86 + 15 + 68 + 56 =
  28. 28.66 + 45 + 58 + 57 =
  29. 29.80 + 67 + 25 + 20 =
  30. 30.53 + 35 + 33 + 53 =
  31. 31.23 + 35 + 19 + 27 =
  32. 32.12 + 19 + 67 + 73 =
  33. 33.53 + 48 + 81 + 74 =
  34. 34.31 + 77 + 82 + 62 =
  35. 35.28 + 64 + 22 + 24 =
  36. 36.50 + 78 + 55 + 70 =
  37. 37.68 + 72 + 31 + 19 =
  38. 38.23 + 87 + 80 + 14 =
  39. 39.26 + 51 + 37 + 71 =
  40. 40.63 + 20 + 34 + 64 =

Answer key

  1. 148
  2. 102
  3. 225
  4. 165
  5. 206
  6. 265
  7. 100
  8. 152
  9. 259
  10. 144
  11. 195
  12. 140
  13. 306
  14. 135
  15. 166
  16. 314
  17. 124
  18. 149
  19. 233
  20. 151
  21. 168
  22. 199
  23. 204
  24. 223
  25. 195
  26. 140
  27. 225
  28. 226
  29. 192
  30. 174
  31. 104
  32. 171
  33. 256
  34. 252
  35. 138
  36. 253
  37. 190
  38. 204
  39. 185
  40. 181

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