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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 762 · 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. 1.38 + 55 + 77 + 19 =
  2. 2.11 + 84 + 83 + 86 =
  3. 3.22 + 54 + 65 + 18 =
  4. 4.18 + 29 + 22 + 13 =
  5. 5.22 + 78 + 77 + 31 =
  6. 6.19 + 15 + 33 + 19 =
  7. 7.25 + 16 + 85 + 33 =
  8. 8.73 + 49 + 58 + 43 =
  9. 9.58 + 13 + 22 + 81 =
  10. 10.20 + 53 + 85 + 38 =
  11. 11.47 + 53 + 21 + 50 =
  12. 12.34 + 36 + 30 + 17 =
  13. 13.34 + 59 + 20 + 15 =
  14. 14.29 + 33 + 45 + 54 =
  15. 15.82 + 24 + 63 + 26 =
  16. 16.26 + 64 + 80 + 14 =
  17. 17.72 + 45 + 51 + 17 =
  18. 18.30 + 43 + 65 + 69 =
  19. 19.71 + 80 + 41 + 82 =
  20. 20.89 + 58 + 65 + 12 =
  21. 21.88 + 21 + 69 + 79 =
  22. 22.31 + 14 + 83 + 43 =
  23. 23.69 + 40 + 28 + 46 =
  24. 24.42 + 64 + 36 + 72 =
  25. 25.13 + 36 + 56 + 26 =
  26. 26.36 + 53 + 42 + 52 =
  27. 27.81 + 80 + 73 + 59 =
  28. 28.31 + 37 + 47 + 61 =
  29. 29.20 + 13 + 37 + 50 =
  30. 30.62 + 41 + 36 + 54 =
  31. 31.14 + 56 + 23 + 58 =
  32. 32.79 + 19 + 85 + 28 =
  33. 33.46 + 89 + 59 + 43 =
  34. 34.88 + 73 + 21 + 57 =
  35. 35.33 + 20 + 67 + 83 =
  36. 36.77 + 70 + 73 + 73 =
  37. 37.27 + 55 + 52 + 33 =
  38. 38.43 + 78 + 39 + 25 =
  39. 39.62 + 89 + 36 + 79 =
  40. 40.69 + 72 + 82 + 22 =

Answer key

  1. 189
  2. 264
  3. 159
  4. 82
  5. 208
  6. 86
  7. 159
  8. 223
  9. 174
  10. 196
  11. 171
  12. 117
  13. 128
  14. 161
  15. 195
  16. 184
  17. 185
  18. 207
  19. 274
  20. 224
  21. 257
  22. 171
  23. 183
  24. 214
  25. 131
  26. 183
  27. 293
  28. 176
  29. 120
  30. 193
  31. 151
  32. 211
  33. 237
  34. 239
  35. 203
  36. 293
  37. 167
  38. 185
  39. 266
  40. 245

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