Advent Puzzles 2014: puzzle 20 solution

Most numbers have several solutions. One solution for each possible total is given below.

1=(20+80)\div(40+60)
2=(20+60)\div(80-40)
3=(20+40)\div(80-60)
4=(20+60+80)\div40
5=(80\div40)+(60\div20)
6=(80\div40)\times(60\div20)
7=(60+80)\div(40-20)
8\mbox{ cannot be made.}
9=(40+60+80)\div20
10=(80-60)\div(40\div20)

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