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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 458 · 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. 1.47 + 17 + 78 + 89 =
  2. 2.71 + 38 + 28 + 48 =
  3. 3.75 + 28 + 20 + 76 =
  4. 4.51 + 58 + 52 + 77 =
  5. 5.41 + 36 + 60 + 33 =
  6. 6.45 + 63 + 56 + 19 =
  7. 7.70 + 25 + 55 + 14 =
  8. 8.56 + 27 + 81 + 89 =
  9. 9.61 + 26 + 43 + 20 =
  10. 10.66 + 70 + 84 + 25 =
  11. 11.88 + 34 + 33 + 62 =
  12. 12.70 + 51 + 71 + 34 =
  13. 13.19 + 63 + 82 + 50 =
  14. 14.19 + 27 + 50 + 49 =
  15. 15.68 + 13 + 85 + 19 =
  16. 16.83 + 69 + 64 + 16 =
  17. 17.47 + 71 + 24 + 43 =
  18. 18.53 + 28 + 41 + 76 =
  19. 19.70 + 20 + 14 + 42 =
  20. 20.36 + 88 + 48 + 27 =
  21. 21.88 + 72 + 72 + 25 =
  22. 22.65 + 38 + 60 + 35 =
  23. 23.23 + 54 + 67 + 17 =
  24. 24.20 + 85 + 44 + 85 =
  25. 25.25 + 70 + 88 + 61 =
  26. 26.20 + 40 + 15 + 17 =
  27. 27.25 + 79 + 82 + 76 =
  28. 28.38 + 23 + 83 + 41 =
  29. 29.88 + 50 + 57 + 81 =
  30. 30.75 + 11 + 15 + 40 =
  31. 31.34 + 18 + 22 + 12 =
  32. 32.38 + 58 + 32 + 55 =
  33. 33.30 + 16 + 49 + 52 =
  34. 34.86 + 58 + 17 + 39 =
  35. 35.52 + 23 + 20 + 67 =
  36. 36.44 + 16 + 23 + 53 =
  37. 37.67 + 25 + 80 + 20 =
  38. 38.21 + 71 + 57 + 58 =
  39. 39.28 + 75 + 53 + 87 =
  40. 40.54 + 86 + 12 + 48 =

Answer key

  1. 231
  2. 185
  3. 199
  4. 238
  5. 170
  6. 183
  7. 164
  8. 253
  9. 150
  10. 245
  11. 217
  12. 226
  13. 214
  14. 145
  15. 185
  16. 232
  17. 185
  18. 198
  19. 146
  20. 199
  21. 257
  22. 198
  23. 161
  24. 234
  25. 244
  26. 92
  27. 262
  28. 185
  29. 276
  30. 141
  31. 86
  32. 183
  33. 147
  34. 200
  35. 162
  36. 136
  37. 192
  38. 207
  39. 243
  40. 200

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