SOLUTION: follow principles of estimation to find an approximate value. round each number so that there is one nonzero digit do not find the exact value Estimate of SUM is 18+52+40+15

Algebra ->  Expressions-with-variables -> SOLUTION: follow principles of estimation to find an approximate value. round each number so that there is one nonzero digit do not find the exact value Estimate of SUM is 18+52+40+15      Log On


   

Question 835679: follow principles of estimation to find an approximate value.
round each number so that there is one nonzero digit
do not find the exact value
Estimate of SUM is
18+52+40+15+77
so should be 20+50+40+(10 or 20)?+80
i think the 15 to 20 should be rounded up just not 100% sure
thanks in advance
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Typically if its 5 or higher you round up so 15 would round up to 20.
%2820%2B50%2B40%2B20%2B80%29