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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 105 · 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. 1.75 + 65 + 88 + 49 =
  2. 2.74 + 21 + 52 + 11 =
  3. 3.36 + 57 + 11 + 71 =
  4. 4.37 + 43 + 78 + 73 =
  5. 5.41 + 18 + 70 + 49 =
  6. 6.83 + 47 + 11 + 56 =
  7. 7.85 + 47 + 62 + 36 =
  8. 8.83 + 31 + 21 + 36 =
  9. 9.68 + 53 + 82 + 52 =
  10. 10.53 + 75 + 32 + 72 =
  11. 11.28 + 25 + 61 + 55 =
  12. 12.73 + 62 + 28 + 16 =
  13. 13.59 + 73 + 43 + 22 =
  14. 14.12 + 24 + 32 + 12 =
  15. 15.61 + 48 + 37 + 43 =
  16. 16.85 + 45 + 21 + 53 =
  17. 17.76 + 33 + 81 + 85 =
  18. 18.68 + 31 + 50 + 57 =
  19. 19.52 + 89 + 34 + 52 =
  20. 20.85 + 36 + 68 + 88 =
  21. 21.59 + 86 + 16 + 11 =
  22. 22.64 + 29 + 69 + 75 =
  23. 23.17 + 66 + 49 + 57 =
  24. 24.25 + 50 + 15 + 46 =
  25. 25.36 + 36 + 26 + 58 =
  26. 26.85 + 66 + 52 + 12 =
  27. 27.86 + 29 + 69 + 88 =
  28. 28.50 + 16 + 42 + 73 =
  29. 29.37 + 16 + 17 + 42 =
  30. 30.19 + 48 + 43 + 38 =
  31. 31.42 + 65 + 30 + 15 =
  32. 32.51 + 68 + 52 + 13 =
  33. 33.62 + 50 + 15 + 31 =
  34. 34.49 + 46 + 29 + 11 =
  35. 35.30 + 53 + 54 + 27 =
  36. 36.22 + 22 + 16 + 27 =
  37. 37.68 + 88 + 15 + 29 =
  38. 38.18 + 74 + 20 + 89 =
  39. 39.48 + 37 + 39 + 69 =
  40. 40.67 + 40 + 72 + 70 =

Answer key

  1. 277
  2. 158
  3. 175
  4. 231
  5. 178
  6. 197
  7. 230
  8. 171
  9. 255
  10. 232
  11. 169
  12. 179
  13. 197
  14. 80
  15. 189
  16. 204
  17. 275
  18. 206
  19. 227
  20. 277
  21. 172
  22. 237
  23. 189
  24. 136
  25. 156
  26. 215
  27. 272
  28. 181
  29. 112
  30. 148
  31. 152
  32. 184
  33. 158
  34. 135
  35. 164
  36. 87
  37. 200
  38. 201
  39. 193
  40. 249

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