Rational numbers

Word problems involving rational numbers
Five pieces of satin were cut from one bale of satin. They were 1/2 m, 9/2 m, 3/10 m, 29/10 m, and 101/20 m long. Find their total length.
From a chain 11 m long, two pieces of lengths
m and are cut off. What is the length of the remaining chain?
Solution: Original length of chain = 11 m
