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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 892 · 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 + 86 + 37 + 74 =
  2. 2.29 + 69 + 88 + 50 =
  3. 3.86 + 70 + 16 + 35 =
  4. 4.48 + 51 + 61 + 48 =
  5. 5.25 + 67 + 73 + 62 =
  6. 6.15 + 88 + 20 + 63 =
  7. 7.64 + 78 + 43 + 72 =
  8. 8.33 + 81 + 34 + 16 =
  9. 9.85 + 79 + 77 + 41 =
  10. 10.82 + 24 + 34 + 86 =
  11. 11.41 + 22 + 76 + 52 =
  12. 12.65 + 64 + 20 + 76 =
  13. 13.12 + 43 + 65 + 58 =
  14. 14.48 + 68 + 72 + 56 =
  15. 15.66 + 52 + 48 + 44 =
  16. 16.16 + 50 + 59 + 11 =
  17. 17.85 + 40 + 20 + 14 =
  18. 18.18 + 47 + 25 + 41 =
  19. 19.35 + 44 + 78 + 59 =
  20. 20.62 + 32 + 18 + 52 =
  21. 21.85 + 67 + 22 + 79 =
  22. 22.36 + 28 + 59 + 64 =
  23. 23.37 + 31 + 84 + 44 =
  24. 24.31 + 81 + 39 + 50 =
  25. 25.70 + 11 + 21 + 61 =
  26. 26.66 + 47 + 77 + 59 =
  27. 27.80 + 76 + 23 + 30 =
  28. 28.26 + 82 + 17 + 64 =
  29. 29.78 + 64 + 37 + 14 =
  30. 30.29 + 67 + 23 + 40 =
  31. 31.29 + 16 + 34 + 57 =
  32. 32.77 + 22 + 13 + 63 =
  33. 33.47 + 55 + 70 + 60 =
  34. 34.78 + 41 + 62 + 45 =
  35. 35.40 + 45 + 15 + 78 =
  36. 36.67 + 35 + 21 + 36 =
  37. 37.34 + 39 + 12 + 83 =
  38. 38.43 + 57 + 37 + 17 =
  39. 39.49 + 51 + 47 + 76 =
  40. 40.28 + 45 + 65 + 82 =

Answer key

  1. 278
  2. 236
  3. 207
  4. 208
  5. 227
  6. 186
  7. 257
  8. 164
  9. 282
  10. 226
  11. 191
  12. 225
  13. 178
  14. 244
  15. 210
  16. 136
  17. 159
  18. 131
  19. 216
  20. 164
  21. 253
  22. 187
  23. 196
  24. 201
  25. 163
  26. 249
  27. 209
  28. 189
  29. 193
  30. 159
  31. 136
  32. 175
  33. 232
  34. 226
  35. 178
  36. 159
  37. 168
  38. 154
  39. 223
  40. 220

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