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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 170 · 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. 1.81 + 82 + 22 + 76 =
  2. 2.48 + 59 + 58 + 75 =
  3. 3.34 + 54 + 44 + 55 =
  4. 4.47 + 56 + 28 + 18 =
  5. 5.32 + 80 + 17 + 34 =
  6. 6.43 + 60 + 56 + 33 =
  7. 7.79 + 44 + 77 + 22 =
  8. 8.16 + 58 + 27 + 57 =
  9. 9.34 + 34 + 87 + 15 =
  10. 10.39 + 43 + 60 + 69 =
  11. 11.21 + 14 + 77 + 61 =
  12. 12.82 + 38 + 37 + 18 =
  13. 13.33 + 29 + 55 + 52 =
  14. 14.21 + 55 + 51 + 23 =
  15. 15.38 + 21 + 83 + 33 =
  16. 16.28 + 40 + 48 + 61 =
  17. 17.56 + 60 + 47 + 47 =
  18. 18.19 + 45 + 56 + 44 =
  19. 19.26 + 62 + 57 + 25 =
  20. 20.79 + 21 + 69 + 35 =
  21. 21.11 + 48 + 45 + 39 =
  22. 22.25 + 65 + 80 + 78 =
  23. 23.83 + 23 + 37 + 55 =
  24. 24.69 + 32 + 32 + 36 =
  25. 25.24 + 13 + 14 + 33 =
  26. 26.69 + 73 + 53 + 36 =
  27. 27.63 + 23 + 39 + 42 =
  28. 28.66 + 26 + 57 + 21 =
  29. 29.12 + 62 + 42 + 79 =
  30. 30.43 + 19 + 64 + 13 =
  31. 31.57 + 78 + 75 + 40 =
  32. 32.59 + 23 + 30 + 17 =
  33. 33.50 + 25 + 56 + 70 =
  34. 34.78 + 44 + 28 + 36 =
  35. 35.56 + 15 + 61 + 54 =
  36. 36.15 + 78 + 32 + 73 =
  37. 37.55 + 51 + 62 + 80 =
  38. 38.45 + 31 + 35 + 62 =
  39. 39.15 + 83 + 81 + 67 =
  40. 40.20 + 19 + 62 + 73 =

Answer key

  1. 261
  2. 240
  3. 187
  4. 149
  5. 163
  6. 192
  7. 222
  8. 158
  9. 170
  10. 211
  11. 173
  12. 175
  13. 169
  14. 150
  15. 175
  16. 177
  17. 210
  18. 164
  19. 170
  20. 204
  21. 143
  22. 248
  23. 198
  24. 169
  25. 84
  26. 231
  27. 167
  28. 170
  29. 195
  30. 139
  31. 250
  32. 129
  33. 201
  34. 186
  35. 186
  36. 198
  37. 248
  38. 173
  39. 246
  40. 174

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