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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 207 · 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. 1.15 + 28 + 25 + 13 =
  2. 2.36 + 14 + 26 + 12 =
  3. 3.79 + 53 + 20 + 89 =
  4. 4.32 + 39 + 68 + 43 =
  5. 5.61 + 21 + 31 + 27 =
  6. 6.21 + 71 + 41 + 17 =
  7. 7.21 + 65 + 33 + 35 =
  8. 8.76 + 16 + 23 + 14 =
  9. 9.47 + 75 + 40 + 83 =
  10. 10.42 + 26 + 79 + 74 =
  11. 11.23 + 33 + 67 + 82 =
  12. 12.55 + 14 + 20 + 56 =
  13. 13.36 + 76 + 58 + 60 =
  14. 14.20 + 85 + 78 + 72 =
  15. 15.21 + 48 + 25 + 32 =
  16. 16.79 + 76 + 20 + 80 =
  17. 17.78 + 61 + 78 + 19 =
  18. 18.37 + 78 + 39 + 44 =
  19. 19.36 + 13 + 73 + 30 =
  20. 20.81 + 54 + 17 + 80 =
  21. 21.89 + 17 + 49 + 57 =
  22. 22.26 + 56 + 26 + 78 =
  23. 23.12 + 44 + 84 + 63 =
  24. 24.85 + 13 + 81 + 84 =
  25. 25.32 + 42 + 26 + 64 =
  26. 26.63 + 42 + 81 + 38 =
  27. 27.79 + 17 + 42 + 13 =
  28. 28.64 + 19 + 44 + 45 =
  29. 29.79 + 12 + 24 + 25 =
  30. 30.59 + 68 + 74 + 44 =
  31. 31.81 + 36 + 85 + 81 =
  32. 32.32 + 26 + 79 + 37 =
  33. 33.53 + 35 + 32 + 71 =
  34. 34.38 + 30 + 18 + 34 =
  35. 35.66 + 41 + 81 + 24 =
  36. 36.55 + 25 + 79 + 27 =
  37. 37.46 + 67 + 23 + 84 =
  38. 38.52 + 37 + 83 + 37 =
  39. 39.19 + 68 + 69 + 43 =
  40. 40.56 + 40 + 80 + 68 =

Answer key

  1. 81
  2. 88
  3. 241
  4. 182
  5. 140
  6. 150
  7. 154
  8. 129
  9. 245
  10. 221
  11. 205
  12. 145
  13. 230
  14. 255
  15. 126
  16. 255
  17. 236
  18. 198
  19. 152
  20. 232
  21. 212
  22. 186
  23. 203
  24. 263
  25. 164
  26. 224
  27. 151
  28. 172
  29. 140
  30. 245
  31. 283
  32. 174
  33. 191
  34. 120
  35. 212
  36. 186
  37. 220
  38. 209
  39. 199
  40. 244

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