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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 456 · 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. 1.25 + 61 + 39 + 51 =
  2. 2.73 + 11 + 14 + 89 =
  3. 3.73 + 15 + 82 + 69 =
  4. 4.47 + 28 + 16 + 28 =
  5. 5.72 + 59 + 87 + 22 =
  6. 6.39 + 70 + 68 + 78 =
  7. 7.69 + 36 + 14 + 46 =
  8. 8.56 + 28 + 49 + 67 =
  9. 9.30 + 35 + 79 + 18 =
  10. 10.74 + 24 + 22 + 29 =
  11. 11.43 + 65 + 29 + 46 =
  12. 12.30 + 81 + 69 + 75 =
  13. 13.52 + 37 + 18 + 61 =
  14. 14.81 + 67 + 26 + 13 =
  15. 15.24 + 40 + 35 + 88 =
  16. 16.36 + 65 + 11 + 60 =
  17. 17.33 + 88 + 12 + 38 =
  18. 18.36 + 13 + 29 + 89 =
  19. 19.18 + 86 + 21 + 84 =
  20. 20.58 + 27 + 32 + 50 =
  21. 21.12 + 43 + 47 + 38 =
  22. 22.13 + 75 + 80 + 42 =
  23. 23.23 + 26 + 30 + 45 =
  24. 24.83 + 84 + 57 + 17 =
  25. 25.34 + 49 + 23 + 26 =
  26. 26.38 + 68 + 64 + 16 =
  27. 27.37 + 76 + 44 + 78 =
  28. 28.67 + 37 + 18 + 54 =
  29. 29.44 + 15 + 87 + 31 =
  30. 30.70 + 80 + 67 + 83 =
  31. 31.79 + 50 + 77 + 58 =
  32. 32.69 + 57 + 36 + 41 =
  33. 33.39 + 24 + 51 + 59 =
  34. 34.25 + 28 + 30 + 77 =
  35. 35.13 + 18 + 40 + 43 =
  36. 36.39 + 60 + 78 + 36 =
  37. 37.35 + 34 + 72 + 28 =
  38. 38.48 + 29 + 80 + 33 =
  39. 39.86 + 13 + 36 + 29 =
  40. 40.54 + 86 + 42 + 77 =

Answer key

  1. 176
  2. 187
  3. 239
  4. 119
  5. 240
  6. 255
  7. 165
  8. 200
  9. 162
  10. 149
  11. 183
  12. 255
  13. 168
  14. 187
  15. 187
  16. 172
  17. 171
  18. 167
  19. 209
  20. 167
  21. 140
  22. 210
  23. 124
  24. 241
  25. 132
  26. 186
  27. 235
  28. 176
  29. 177
  30. 300
  31. 264
  32. 203
  33. 173
  34. 160
  35. 114
  36. 213
  37. 169
  38. 190
  39. 164
  40. 259

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