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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 448 · 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. 1.21 + 21 + 56 + 44 =
  2. 2.58 + 19 + 75 + 89 =
  3. 3.15 + 22 + 56 + 12 =
  4. 4.65 + 75 + 27 + 79 =
  5. 5.73 + 65 + 24 + 31 =
  6. 6.44 + 49 + 66 + 60 =
  7. 7.25 + 60 + 78 + 22 =
  8. 8.40 + 80 + 38 + 49 =
  9. 9.30 + 33 + 30 + 48 =
  10. 10.59 + 74 + 88 + 49 =
  11. 11.18 + 37 + 37 + 68 =
  12. 12.30 + 37 + 49 + 19 =
  13. 13.67 + 59 + 51 + 80 =
  14. 14.57 + 51 + 18 + 72 =
  15. 15.40 + 58 + 11 + 84 =
  16. 16.18 + 62 + 51 + 33 =
  17. 17.17 + 22 + 38 + 12 =
  18. 18.16 + 45 + 70 + 84 =
  19. 19.68 + 37 + 66 + 30 =
  20. 20.21 + 39 + 17 + 18 =
  21. 21.14 + 88 + 29 + 81 =
  22. 22.64 + 67 + 84 + 87 =
  23. 23.71 + 15 + 31 + 29 =
  24. 24.46 + 76 + 23 + 19 =
  25. 25.55 + 20 + 15 + 13 =
  26. 26.38 + 43 + 89 + 45 =
  27. 27.75 + 26 + 62 + 41 =
  28. 28.89 + 11 + 78 + 12 =
  29. 29.14 + 16 + 30 + 26 =
  30. 30.42 + 34 + 42 + 41 =
  31. 31.11 + 67 + 23 + 62 =
  32. 32.26 + 24 + 15 + 73 =
  33. 33.27 + 67 + 76 + 79 =
  34. 34.32 + 53 + 84 + 77 =
  35. 35.66 + 68 + 44 + 23 =
  36. 36.34 + 72 + 29 + 58 =
  37. 37.88 + 58 + 21 + 73 =
  38. 38.63 + 69 + 62 + 76 =
  39. 39.81 + 33 + 73 + 21 =
  40. 40.44 + 57 + 28 + 67 =

Answer key

  1. 142
  2. 241
  3. 105
  4. 246
  5. 193
  6. 219
  7. 185
  8. 207
  9. 141
  10. 270
  11. 160
  12. 135
  13. 257
  14. 198
  15. 193
  16. 164
  17. 89
  18. 215
  19. 201
  20. 95
  21. 212
  22. 302
  23. 146
  24. 164
  25. 103
  26. 215
  27. 204
  28. 190
  29. 86
  30. 159
  31. 163
  32. 138
  33. 249
  34. 246
  35. 201
  36. 193
  37. 240
  38. 270
  39. 208
  40. 196

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