5/6+2/9+7/18 11/12-(3/8-1/12) 2/3-1/4-1/6 7/11-1/5+8/11-4/5 1/3+4+2/3-7/20 1又5/8+4又7/13+(4又3/8-3又7/13)
问题描述:
5/6+2/9+7/18 11/12-(3/8-1/12) 2/3-1/4-1/6 7/11-1/5+8/11-4/5 1/3+4+2/3-7/20 1又5/8+4又7/13+(4又3/8-3又7/13)
答
(1)=15/18+4/18+7/18=26/18=13/9(2)=11/12-(9/24-2/24)=11/12-7/24=22/24-7/24=5/8(3)=8/12-3/12-2/12=1/4(4)=35/55-11/55+40/55-44/55=4/11(5)=4+(1/3+2/3)-7/20=5-7/20=100/20-7/20=93/20(6)=13/8+59/13+35/8-46/1...