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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 161 · 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. 1.77 + 40 + 71 + 20 =
  2. 2.74 + 68 + 31 + 69 =
  3. 3.26 + 50 + 28 + 51 =
  4. 4.17 + 45 + 63 + 74 =
  5. 5.45 + 58 + 82 + 19 =
  6. 6.51 + 74 + 39 + 15 =
  7. 7.87 + 72 + 24 + 40 =
  8. 8.21 + 53 + 43 + 71 =
  9. 9.15 + 34 + 55 + 49 =
  10. 10.19 + 42 + 32 + 14 =
  11. 11.79 + 14 + 81 + 28 =
  12. 12.24 + 21 + 63 + 49 =
  13. 13.54 + 62 + 43 + 59 =
  14. 14.31 + 19 + 70 + 32 =
  15. 15.32 + 63 + 29 + 19 =
  16. 16.21 + 37 + 85 + 47 =
  17. 17.44 + 16 + 13 + 69 =
  18. 18.32 + 11 + 56 + 54 =
  19. 19.13 + 16 + 48 + 23 =
  20. 20.73 + 57 + 17 + 21 =
  21. 21.41 + 13 + 13 + 24 =
  22. 22.88 + 23 + 18 + 28 =
  23. 23.78 + 18 + 57 + 19 =
  24. 24.66 + 46 + 29 + 68 =
  25. 25.81 + 11 + 84 + 80 =
  26. 26.55 + 20 + 20 + 46 =
  27. 27.68 + 44 + 30 + 74 =
  28. 28.20 + 49 + 33 + 81 =
  29. 29.15 + 18 + 82 + 47 =
  30. 30.68 + 41 + 71 + 45 =
  31. 31.36 + 69 + 54 + 49 =
  32. 32.37 + 13 + 29 + 12 =
  33. 33.83 + 63 + 47 + 18 =
  34. 34.63 + 27 + 28 + 87 =
  35. 35.38 + 71 + 15 + 33 =
  36. 36.65 + 49 + 31 + 84 =
  37. 37.53 + 28 + 38 + 31 =
  38. 38.22 + 76 + 20 + 79 =
  39. 39.75 + 39 + 54 + 13 =
  40. 40.28 + 14 + 43 + 26 =

Answer key

  1. 208
  2. 242
  3. 155
  4. 199
  5. 204
  6. 179
  7. 223
  8. 188
  9. 153
  10. 107
  11. 202
  12. 157
  13. 218
  14. 152
  15. 143
  16. 190
  17. 142
  18. 153
  19. 100
  20. 168
  21. 91
  22. 157
  23. 172
  24. 209
  25. 256
  26. 141
  27. 216
  28. 183
  29. 162
  30. 225
  31. 208
  32. 91
  33. 211
  34. 205
  35. 157
  36. 229
  37. 150
  38. 197
  39. 181
  40. 111

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