[knittnmom]

IMO, 354 should also be rounded up instead of down. (I thought 50 and under round down, and 51 and up round up.)

[KarlInOhio]

I fell for the old trick in grade school where I wanted the estimate to be the rounded value of the result (600) instead of rounding the inputs and taking what you get. I had a lot of red marks on my homework because I liked calculating the real number and hated when the estimate didn't match it, even when the teacher was trying to break us of that method to get us to quickly round the inputs and add rather than add and then round off.