17⼀20×2⼀3+17⼀20×1⼀3-1⼀2和(3⼀4-4⼀9)×36简便算法

2025年03月24日 06:31
有2个网友回答
网友(1):

17/20×2/3+17/20×1/3-1/2
=17/20×(1/3+1/3)-1/2
=17/20-1/2
=7/20

(3/4-4/9)×36
=3/4×36-4/9×36
=27-16
=11

网友(2):

17/20×2/3+17/20×1/3-1/2
=17/20×﹙2/3+1/3﹚-1/2
=17/20×1-1/2
=17/20-1/2
=17/20-10/20
=7/20
﹙3/4-4/9﹚×36
=3/4×36-4/9×36
=27-16
=11