9⼀11÷中括号小括号1⼀5+1⼀6括号乘9⼀11中括号怎么用简便方法计算?

2025-01-03 07:03:26
推荐回答(2个)
回答1:

9/11÷ [(1/5+1/6 ) x 9/11]
= 9/11/[(6/30+5/30 ) x 9/11]
= 9/11/(11/30 x 9/11]
【用9/11约分】
=1/(11/30)
=30/11
=2又8/11

回答2: