简便计算 21÷(1⼀3+2⼀5)÷9⼀11

2025-04-25 20:03:29
推荐回答(2个)
回答1:

21÷(1/3+2/5)÷9/11
= 21÷[(5/15+6/15)×(9/11)]
= 21÷[(11/15)×(9/11)]
= 21÷(9/15)
=21÷(3/5)
=21×(5/3)
=35

回答2:

21÷(1/3+2/5)÷9/11
=21÷(5/15+6/15)÷9/11 1*5/(3*5)+(2*3)/)5*3)
= 21÷[(11/15)×(9/11)]
= 21÷(9/15)
=21÷(3/5)
=21×(5/3)
=35