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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 608 · 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. 1.38 + 38 + 45 + 62 =
  2. 2.19 + 89 + 68 + 29 =
  3. 3.30 + 59 + 28 + 44 =
  4. 4.50 + 67 + 63 + 37 =
  5. 5.70 + 88 + 73 + 64 =
  6. 6.88 + 42 + 54 + 68 =
  7. 7.18 + 15 + 16 + 69 =
  8. 8.22 + 34 + 44 + 56 =
  9. 9.26 + 11 + 50 + 74 =
  10. 10.85 + 81 + 22 + 71 =
  11. 11.68 + 49 + 27 + 34 =
  12. 12.67 + 60 + 31 + 14 =
  13. 13.21 + 29 + 85 + 17 =
  14. 14.48 + 81 + 25 + 24 =
  15. 15.27 + 47 + 35 + 19 =
  16. 16.51 + 26 + 12 + 72 =
  17. 17.31 + 30 + 23 + 13 =
  18. 18.63 + 82 + 49 + 85 =
  19. 19.76 + 30 + 39 + 25 =
  20. 20.51 + 61 + 37 + 39 =
  21. 21.85 + 85 + 83 + 27 =
  22. 22.53 + 19 + 75 + 25 =
  23. 23.43 + 86 + 44 + 56 =
  24. 24.71 + 49 + 70 + 56 =
  25. 25.43 + 50 + 29 + 51 =
  26. 26.25 + 88 + 58 + 88 =
  27. 27.77 + 68 + 61 + 41 =
  28. 28.30 + 16 + 17 + 52 =
  29. 29.16 + 60 + 11 + 67 =
  30. 30.79 + 62 + 57 + 41 =
  31. 31.32 + 14 + 38 + 45 =
  32. 32.20 + 59 + 34 + 62 =
  33. 33.59 + 66 + 70 + 78 =
  34. 34.82 + 75 + 55 + 88 =
  35. 35.60 + 22 + 76 + 30 =
  36. 36.55 + 60 + 28 + 22 =
  37. 37.58 + 35 + 72 + 84 =
  38. 38.21 + 73 + 19 + 19 =
  39. 39.57 + 37 + 29 + 32 =
  40. 40.78 + 17 + 84 + 75 =

Answer key

  1. 183
  2. 205
  3. 161
  4. 217
  5. 295
  6. 252
  7. 118
  8. 156
  9. 161
  10. 259
  11. 178
  12. 172
  13. 152
  14. 178
  15. 128
  16. 161
  17. 97
  18. 279
  19. 170
  20. 188
  21. 280
  22. 172
  23. 229
  24. 246
  25. 173
  26. 259
  27. 247
  28. 115
  29. 154
  30. 239
  31. 129
  32. 175
  33. 273
  34. 300
  35. 188
  36. 165
  37. 249
  38. 132
  39. 155
  40. 254

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