1又1⼀8÷ (1⼀4+2又1⼀2)×4⼀5回括等于多少用脱式计算?

2025-04-13 23:53:34
推荐回答(1个)
回答1:

1又1/8÷(1/4+2又1/2)*4/5
=9/8÷(1/4+5/2)*4/5
=9/8÷(1/4+10/4)*4/5
=9/8÷11/4 *4/5
=9/8*4/11 *4/5
=9/22 *4/5
=18/55