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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 775 · 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. 1.71 + 42 + 22 + 16 =
  2. 2.73 + 83 + 12 + 31 =
  3. 3.35 + 26 + 81 + 74 =
  4. 4.16 + 49 + 20 + 42 =
  5. 5.27 + 76 + 71 + 38 =
  6. 6.34 + 70 + 80 + 16 =
  7. 7.32 + 37 + 21 + 35 =
  8. 8.68 + 63 + 82 + 63 =
  9. 9.30 + 67 + 83 + 60 =
  10. 10.26 + 63 + 71 + 71 =
  11. 11.46 + 69 + 17 + 11 =
  12. 12.37 + 19 + 77 + 50 =
  13. 13.38 + 54 + 56 + 65 =
  14. 14.31 + 18 + 31 + 33 =
  15. 15.18 + 46 + 55 + 61 =
  16. 16.22 + 32 + 47 + 42 =
  17. 17.22 + 20 + 74 + 38 =
  18. 18.65 + 13 + 14 + 38 =
  19. 19.49 + 28 + 18 + 45 =
  20. 20.31 + 59 + 62 + 52 =
  21. 21.71 + 25 + 71 + 18 =
  22. 22.11 + 15 + 64 + 38 =
  23. 23.27 + 13 + 38 + 82 =
  24. 24.40 + 22 + 49 + 39 =
  25. 25.19 + 30 + 37 + 30 =
  26. 26.37 + 64 + 46 + 60 =
  27. 27.25 + 81 + 71 + 53 =
  28. 28.21 + 22 + 48 + 22 =
  29. 29.63 + 31 + 81 + 71 =
  30. 30.49 + 14 + 28 + 43 =
  31. 31.80 + 45 + 33 + 50 =
  32. 32.68 + 76 + 37 + 22 =
  33. 33.21 + 52 + 28 + 20 =
  34. 34.23 + 46 + 11 + 61 =
  35. 35.74 + 30 + 64 + 53 =
  36. 36.54 + 25 + 19 + 23 =
  37. 37.60 + 77 + 31 + 32 =
  38. 38.31 + 16 + 77 + 19 =
  39. 39.79 + 14 + 21 + 69 =
  40. 40.63 + 26 + 31 + 38 =

Answer key

  1. 151
  2. 199
  3. 216
  4. 127
  5. 212
  6. 200
  7. 125
  8. 276
  9. 240
  10. 231
  11. 143
  12. 183
  13. 213
  14. 113
  15. 180
  16. 143
  17. 154
  18. 130
  19. 140
  20. 204
  21. 185
  22. 128
  23. 160
  24. 150
  25. 116
  26. 207
  27. 230
  28. 113
  29. 246
  30. 134
  31. 208
  32. 203
  33. 121
  34. 141
  35. 221
  36. 121
  37. 200
  38. 143
  39. 183
  40. 158

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