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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 110 · 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. 1.32 + 67 + 51 + 51 =
  2. 2.66 + 42 + 11 + 67 =
  3. 3.30 + 15 + 76 + 11 =
  4. 4.49 + 62 + 85 + 72 =
  5. 5.82 + 52 + 55 + 63 =
  6. 6.27 + 59 + 33 + 61 =
  7. 7.25 + 28 + 14 + 23 =
  8. 8.34 + 38 + 69 + 45 =
  9. 9.33 + 14 + 18 + 17 =
  10. 10.49 + 64 + 80 + 17 =
  11. 11.13 + 26 + 13 + 81 =
  12. 12.40 + 61 + 49 + 33 =
  13. 13.27 + 75 + 84 + 86 =
  14. 14.14 + 19 + 25 + 80 =
  15. 15.56 + 40 + 20 + 71 =
  16. 16.38 + 48 + 37 + 22 =
  17. 17.64 + 27 + 30 + 65 =
  18. 18.74 + 31 + 23 + 62 =
  19. 19.75 + 83 + 64 + 83 =
  20. 20.79 + 41 + 45 + 18 =
  21. 21.56 + 22 + 50 + 19 =
  22. 22.46 + 74 + 45 + 41 =
  23. 23.26 + 45 + 65 + 80 =
  24. 24.58 + 78 + 64 + 59 =
  25. 25.37 + 65 + 85 + 58 =
  26. 26.35 + 53 + 51 + 43 =
  27. 27.83 + 21 + 56 + 57 =
  28. 28.85 + 85 + 39 + 13 =
  29. 29.24 + 55 + 85 + 27 =
  30. 30.13 + 57 + 78 + 52 =
  31. 31.44 + 51 + 33 + 32 =
  32. 32.83 + 42 + 55 + 19 =
  33. 33.47 + 67 + 69 + 51 =
  34. 34.35 + 81 + 14 + 14 =
  35. 35.38 + 57 + 23 + 25 =
  36. 36.66 + 60 + 74 + 87 =
  37. 37.27 + 45 + 49 + 54 =
  38. 38.55 + 50 + 25 + 21 =
  39. 39.62 + 88 + 81 + 73 =
  40. 40.24 + 64 + 32 + 11 =

Answer key

  1. 201
  2. 186
  3. 132
  4. 268
  5. 252
  6. 180
  7. 90
  8. 186
  9. 82
  10. 210
  11. 133
  12. 183
  13. 272
  14. 138
  15. 187
  16. 145
  17. 186
  18. 190
  19. 305
  20. 183
  21. 147
  22. 206
  23. 216
  24. 259
  25. 245
  26. 182
  27. 217
  28. 222
  29. 191
  30. 200
  31. 160
  32. 199
  33. 234
  34. 144
  35. 143
  36. 287
  37. 175
  38. 151
  39. 304
  40. 131

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