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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 199 · 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. 1.19 + 51 + 88 + 42 =
  2. 2.75 + 56 + 26 + 83 =
  3. 3.38 + 74 + 79 + 67 =
  4. 4.69 + 29 + 44 + 12 =
  5. 5.62 + 46 + 79 + 80 =
  6. 6.78 + 31 + 29 + 14 =
  7. 7.60 + 49 + 58 + 41 =
  8. 8.47 + 26 + 50 + 47 =
  9. 9.50 + 77 + 67 + 87 =
  10. 10.67 + 23 + 22 + 29 =
  11. 11.39 + 19 + 11 + 13 =
  12. 12.50 + 49 + 27 + 82 =
  13. 13.41 + 19 + 46 + 82 =
  14. 14.16 + 25 + 55 + 54 =
  15. 15.27 + 49 + 81 + 11 =
  16. 16.24 + 43 + 24 + 81 =
  17. 17.47 + 68 + 78 + 48 =
  18. 18.65 + 35 + 71 + 29 =
  19. 19.19 + 23 + 66 + 56 =
  20. 20.11 + 50 + 31 + 20 =
  21. 21.15 + 38 + 20 + 16 =
  22. 22.52 + 21 + 37 + 47 =
  23. 23.36 + 79 + 44 + 16 =
  24. 24.23 + 15 + 13 + 27 =
  25. 25.53 + 84 + 62 + 11 =
  26. 26.31 + 54 + 20 + 11 =
  27. 27.80 + 70 + 71 + 82 =
  28. 28.12 + 16 + 44 + 33 =
  29. 29.26 + 41 + 16 + 78 =
  30. 30.82 + 36 + 45 + 19 =
  31. 31.28 + 51 + 64 + 62 =
  32. 32.19 + 24 + 61 + 12 =
  33. 33.89 + 55 + 62 + 50 =
  34. 34.53 + 38 + 62 + 50 =
  35. 35.60 + 27 + 25 + 86 =
  36. 36.68 + 45 + 11 + 81 =
  37. 37.67 + 12 + 47 + 74 =
  38. 38.59 + 21 + 30 + 37 =
  39. 39.86 + 15 + 82 + 86 =
  40. 40.67 + 80 + 28 + 65 =

Answer key

  1. 200
  2. 240
  3. 258
  4. 154
  5. 267
  6. 152
  7. 208
  8. 170
  9. 281
  10. 141
  11. 82
  12. 208
  13. 188
  14. 150
  15. 168
  16. 172
  17. 241
  18. 200
  19. 164
  20. 112
  21. 89
  22. 157
  23. 175
  24. 78
  25. 210
  26. 116
  27. 303
  28. 105
  29. 161
  30. 182
  31. 205
  32. 116
  33. 256
  34. 203
  35. 198
  36. 205
  37. 200
  38. 147
  39. 269
  40. 240

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