Originally Posted by Zen Scanner
Originally Posted by LNEsMom
But DS said, no she's not correct because she should have rounded to 50 not 40 and then she would have realized she didn't have enough beads.

Seems to me that given specific quantity needs, the correct answer is that this is not an appropriate time to use estimation. 47 would also round to 50, but 3x47 < 144.

The correct answer is "always round up and then see if you can return or sell the inevitable leftovers." <--says the woman with far too many single skeins of yarn because of this very tendency, and then a tendency to never get around to returning or selling stuff.