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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 798 · 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. 1.73 + 73 + 29 + 52 =
  2. 2.34 + 42 + 79 + 27 =
  3. 3.62 + 54 + 63 + 37 =
  4. 4.79 + 43 + 82 + 28 =
  5. 5.55 + 14 + 30 + 11 =
  6. 6.73 + 32 + 79 + 73 =
  7. 7.83 + 29 + 75 + 27 =
  8. 8.27 + 61 + 60 + 34 =
  9. 9.54 + 39 + 68 + 82 =
  10. 10.43 + 67 + 52 + 34 =
  11. 11.25 + 84 + 32 + 13 =
  12. 12.24 + 44 + 70 + 81 =
  13. 13.12 + 28 + 51 + 71 =
  14. 14.67 + 77 + 13 + 20 =
  15. 15.86 + 55 + 64 + 86 =
  16. 16.78 + 31 + 24 + 38 =
  17. 17.32 + 81 + 14 + 17 =
  18. 18.76 + 24 + 30 + 58 =
  19. 19.23 + 22 + 54 + 71 =
  20. 20.89 + 56 + 11 + 30 =
  21. 21.40 + 78 + 14 + 13 =
  22. 22.68 + 62 + 78 + 26 =
  23. 23.19 + 86 + 79 + 36 =
  24. 24.41 + 54 + 64 + 19 =
  25. 25.18 + 17 + 54 + 36 =
  26. 26.54 + 83 + 23 + 26 =
  27. 27.29 + 88 + 61 + 43 =
  28. 28.13 + 44 + 32 + 51 =
  29. 29.12 + 56 + 52 + 11 =
  30. 30.14 + 43 + 30 + 41 =
  31. 31.50 + 32 + 33 + 52 =
  32. 32.86 + 58 + 44 + 17 =
  33. 33.40 + 47 + 45 + 84 =
  34. 34.60 + 21 + 49 + 48 =
  35. 35.75 + 33 + 68 + 86 =
  36. 36.50 + 15 + 19 + 56 =
  37. 37.67 + 30 + 88 + 77 =
  38. 38.70 + 77 + 41 + 78 =
  39. 39.45 + 20 + 53 + 56 =
  40. 40.83 + 52 + 74 + 86 =

Answer key

  1. 227
  2. 182
  3. 216
  4. 232
  5. 110
  6. 257
  7. 214
  8. 182
  9. 243
  10. 196
  11. 154
  12. 219
  13. 162
  14. 177
  15. 291
  16. 171
  17. 144
  18. 188
  19. 170
  20. 186
  21. 145
  22. 234
  23. 220
  24. 178
  25. 125
  26. 186
  27. 221
  28. 140
  29. 131
  30. 128
  31. 167
  32. 205
  33. 216
  34. 178
  35. 262
  36. 140
  37. 262
  38. 266
  39. 174
  40. 295

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