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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 485 · 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. 1.86 + 80 + 66 + 30 =
  2. 2.49 + 23 + 35 + 61 =
  3. 3.57 + 43 + 87 + 77 =
  4. 4.34 + 48 + 19 + 13 =
  5. 5.75 + 43 + 66 + 27 =
  6. 6.23 + 54 + 19 + 47 =
  7. 7.41 + 11 + 80 + 42 =
  8. 8.28 + 18 + 24 + 51 =
  9. 9.58 + 48 + 43 + 81 =
  10. 10.26 + 79 + 25 + 45 =
  11. 11.14 + 59 + 63 + 64 =
  12. 12.47 + 79 + 20 + 42 =
  13. 13.38 + 66 + 53 + 39 =
  14. 14.44 + 72 + 40 + 70 =
  15. 15.27 + 50 + 72 + 19 =
  16. 16.35 + 81 + 79 + 29 =
  17. 17.88 + 33 + 39 + 37 =
  18. 18.69 + 46 + 22 + 89 =
  19. 19.71 + 25 + 82 + 18 =
  20. 20.52 + 49 + 82 + 40 =
  21. 21.52 + 52 + 54 + 24 =
  22. 22.20 + 54 + 51 + 13 =
  23. 23.67 + 26 + 36 + 52 =
  24. 24.27 + 83 + 68 + 12 =
  25. 25.35 + 81 + 75 + 28 =
  26. 26.25 + 42 + 28 + 28 =
  27. 27.57 + 28 + 67 + 43 =
  28. 28.69 + 59 + 41 + 30 =
  29. 29.74 + 64 + 84 + 37 =
  30. 30.20 + 77 + 27 + 62 =
  31. 31.44 + 71 + 80 + 64 =
  32. 32.13 + 27 + 65 + 60 =
  33. 33.60 + 87 + 39 + 26 =
  34. 34.32 + 15 + 87 + 34 =
  35. 35.80 + 30 + 11 + 20 =
  36. 36.60 + 11 + 57 + 37 =
  37. 37.15 + 47 + 67 + 13 =
  38. 38.44 + 63 + 26 + 17 =
  39. 39.21 + 85 + 87 + 22 =
  40. 40.60 + 38 + 49 + 21 =

Answer key

  1. 262
  2. 168
  3. 264
  4. 114
  5. 211
  6. 143
  7. 174
  8. 121
  9. 230
  10. 175
  11. 200
  12. 188
  13. 196
  14. 226
  15. 168
  16. 224
  17. 197
  18. 226
  19. 196
  20. 223
  21. 182
  22. 138
  23. 181
  24. 190
  25. 219
  26. 123
  27. 195
  28. 199
  29. 259
  30. 186
  31. 259
  32. 165
  33. 212
  34. 168
  35. 141
  36. 165
  37. 142
  38. 150
  39. 215
  40. 168

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