简便计算(1.) 7⼀18-1⼀2÷3⼀4-1⼀3 (2.)1⼀6+3⼀4×2⼀3÷2 (3.)4⼀25÷【(2⼀5+1⼀3)×9⼀11】

急急急
2025-06-24 10:58:48
推荐回答(1个)
回答1:

1.)
7/18-1/2÷3/4-1/3
=7/18-1/2x4/3-1/3
=7/18-2/3-1/3
=7/18-1
= -11/18
(2.)
1/6+3/4×2/3÷2
=1/6+1/2÷2
=1/6+1/4
=2/12+3/12
=5/12
(3.)
4/25÷【(2/5+1/3)×9/11】
=4/25÷【(6/15+5/15)×9/11】
=4/25÷【(11/15)×9/11】
=4/25÷(3/5)
=4/25x5/3
=4/15