3⼀20÷0.2×2⼀3 4⼀9÷8⼀3÷4⼀9 5⼀21÷10⼀7×3⼀4 6⼀17÷12⼀17÷7⼀9 都要简便

2024-11-23 03:44:55
推荐回答(1个)
回答1:

3/20÷0.2×2/3

=3/20*5*2/3
=1/2
4/9÷8/3÷4/9

=4/9÷4/9÷8/3
=1*3/8
=3/8
5/21÷10/7×3/4
=5/21*7/10*3/4
=1/2*1/4
=1/8
6/17÷12/17÷7/9

=6/17*17/12*9/7
=1/2*9/7
=9/14