1又1/8*7又7/13*8+8*11/13*1.125-112.5*13/13*0.08+412/13/8/9

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 01:31:22

1又1/8*7又7/13*8+8*11/13*1.125-112.5*13/13*0.08+412/13/8/9
1又1/8*7又7/13*8+8*11/13*1.125-112.5*13/13*0.08+412/13/8/9

1又1/8*7又7/13*8+8*11/13*1.125-112.5*13/13*0.08+412/13/8/9
1又1/8*7又7/13*8+8*11/13*1.125-112.5*13/13*0.08+4又12/13/8/9
=9/8*7又7/13*8+8*11/13*9/8-9/8*8+8*8/13*9/8
=9/8*8(7又7/13+11/13-1+8/13)
=9*8
=72