2⼀3-(5⼀6-3⼀4)÷3⼀8 和 5⼀14÷{6⼀7×(4⼀9+1⼀6)} 注{ 为大括号

2024-11-15 14:27:24
推荐回答(2个)
回答1:

2/3-(5/6-3/4)÷3/8
=2/3-1/12×8/3
=2/3-2/9
=4/9

5/14÷{6/7×(4/9+1/6)}

=5/14÷(6/7×7/18)
=5/14÷1/3
=15/14

回答2:

2/3-(5/6-3/4)÷3/8
=2/3-1/12×8/3
=2/3-2/9
=4/9

5/14÷{6/7×(4/9+1/6)}
=5/14÷{6/7×11/18}
=5/14÷11/21
=15/22