You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

A carpenter bought a piece of wood that was 8.9 centimeters long.Then he sawed 2.3 centimeters off the end. How long is the piece ofwood now?
6.6

Mike joined his school's band. He bought a trumpet for $145.16,and a song book which was $5.84. How much did Mike spend at themusic store?
151.0

There are 7 crayons in the drawer and 6 crayons on the desk. Samplaced 4 crayons and 8 scissors on the desk. How many crayons arenow there in total?

17.0

