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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 446 · 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. 1.42 + 16 + 64 + 34 =
  2. 2.77 + 82 + 13 + 80 =
  3. 3.85 + 55 + 46 + 71 =
  4. 4.29 + 19 + 45 + 87 =
  5. 5.20 + 80 + 65 + 85 =
  6. 6.81 + 75 + 80 + 71 =
  7. 7.24 + 83 + 31 + 29 =
  8. 8.14 + 19 + 15 + 69 =
  9. 9.89 + 15 + 40 + 38 =
  10. 10.29 + 74 + 33 + 39 =
  11. 11.52 + 68 + 55 + 12 =
  12. 12.39 + 50 + 15 + 38 =
  13. 13.39 + 49 + 30 + 53 =
  14. 14.70 + 50 + 69 + 69 =
  15. 15.26 + 38 + 70 + 44 =
  16. 16.37 + 16 + 31 + 24 =
  17. 17.18 + 22 + 30 + 64 =
  18. 18.21 + 23 + 28 + 43 =
  19. 19.30 + 54 + 27 + 44 =
  20. 20.52 + 76 + 47 + 42 =
  21. 21.32 + 14 + 66 + 25 =
  22. 22.78 + 64 + 31 + 27 =
  23. 23.16 + 25 + 74 + 81 =
  24. 24.18 + 78 + 55 + 33 =
  25. 25.83 + 13 + 24 + 15 =
  26. 26.16 + 21 + 45 + 13 =
  27. 27.67 + 81 + 57 + 51 =
  28. 28.26 + 50 + 82 + 19 =
  29. 29.14 + 12 + 14 + 89 =
  30. 30.75 + 54 + 53 + 76 =
  31. 31.48 + 62 + 60 + 59 =
  32. 32.11 + 34 + 18 + 48 =
  33. 33.49 + 89 + 88 + 45 =
  34. 34.49 + 45 + 19 + 73 =
  35. 35.45 + 20 + 18 + 29 =
  36. 36.52 + 52 + 78 + 16 =
  37. 37.33 + 17 + 89 + 32 =
  38. 38.82 + 11 + 13 + 53 =
  39. 39.82 + 65 + 52 + 18 =
  40. 40.71 + 69 + 71 + 24 =

Answer key

  1. 156
  2. 252
  3. 257
  4. 180
  5. 250
  6. 307
  7. 167
  8. 117
  9. 182
  10. 175
  11. 187
  12. 142
  13. 171
  14. 258
  15. 178
  16. 108
  17. 134
  18. 115
  19. 155
  20. 217
  21. 137
  22. 200
  23. 196
  24. 184
  25. 135
  26. 95
  27. 256
  28. 177
  29. 129
  30. 258
  31. 229
  32. 111
  33. 271
  34. 186
  35. 112
  36. 198
  37. 171
  38. 159
  39. 217
  40. 235

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