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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 346 · 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. 1.32 + 16 + 45 + 62 =
  2. 2.11 + 62 + 27 + 85 =
  3. 3.21 + 84 + 38 + 55 =
  4. 4.31 + 46 + 17 + 20 =
  5. 5.49 + 67 + 77 + 54 =
  6. 6.88 + 23 + 59 + 82 =
  7. 7.58 + 49 + 49 + 66 =
  8. 8.38 + 18 + 23 + 70 =
  9. 9.39 + 50 + 30 + 64 =
  10. 10.25 + 40 + 34 + 60 =
  11. 11.49 + 27 + 27 + 74 =
  12. 12.64 + 66 + 21 + 55 =
  13. 13.44 + 35 + 61 + 54 =
  14. 14.24 + 81 + 75 + 68 =
  15. 15.38 + 49 + 77 + 16 =
  16. 16.85 + 43 + 51 + 69 =
  17. 17.57 + 69 + 11 + 57 =
  18. 18.44 + 57 + 62 + 13 =
  19. 19.71 + 39 + 35 + 38 =
  20. 20.47 + 58 + 59 + 55 =
  21. 21.19 + 70 + 85 + 33 =
  22. 22.34 + 76 + 26 + 20 =
  23. 23.49 + 78 + 64 + 70 =
  24. 24.20 + 22 + 56 + 89 =
  25. 25.28 + 58 + 18 + 55 =
  26. 26.86 + 59 + 53 + 41 =
  27. 27.28 + 19 + 50 + 29 =
  28. 28.54 + 46 + 44 + 60 =
  29. 29.43 + 50 + 78 + 62 =
  30. 30.78 + 77 + 71 + 31 =
  31. 31.48 + 59 + 39 + 61 =
  32. 32.21 + 45 + 19 + 68 =
  33. 33.35 + 55 + 54 + 66 =
  34. 34.36 + 29 + 17 + 56 =
  35. 35.41 + 59 + 66 + 14 =
  36. 36.83 + 67 + 43 + 31 =
  37. 37.83 + 26 + 74 + 74 =
  38. 38.81 + 35 + 60 + 25 =
  39. 39.40 + 29 + 63 + 46 =
  40. 40.54 + 52 + 31 + 23 =

Answer key

  1. 155
  2. 185
  3. 198
  4. 114
  5. 247
  6. 252
  7. 222
  8. 149
  9. 183
  10. 159
  11. 177
  12. 206
  13. 194
  14. 248
  15. 180
  16. 248
  17. 194
  18. 176
  19. 183
  20. 219
  21. 207
  22. 156
  23. 261
  24. 187
  25. 159
  26. 239
  27. 126
  28. 204
  29. 233
  30. 257
  31. 207
  32. 153
  33. 210
  34. 138
  35. 180
  36. 224
  37. 257
  38. 201
  39. 178
  40. 160

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