(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/29 08:19:40
![(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!](/uploads/image/z/108111-39-1.jpg?t=%289%E5%88%86%E4%B9%8B7-18%E5%88%86%E4%B9%8B5%29%C3%97%288%E5%88%86%E4%B9%8B5%2B4%E5%88%86%E4%B9%8B3%29%3D+%EF%BC%8832%2B23%E5%88%86%E4%B9%8B8%C3%B78-23%E5%88%86%E4%B9%8B1%3D+30-16.72-13.28%3D%EF%BC%887-5%E5%88%86%E4%B9%8B4%C3%974%E5%88%86%E4%B9%8B3%EF%BC%89%C3%B75%E5%88%86%E4%B9%8B3%3D+7.2%C3%97102%3D+724-56%C3%9732%C3%B728%3D+5.4%C3%9714%2B15%C3%975.4%2B5.4%3D+20%C3%9721%E5%88%86%E4%B9%8B20%2B21%E5%88%86%E4%B9%8B20%2B8%E5%88%86%E4%B9%8B5%3D+%E9%83%BD%E6%98%AF%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%21)
(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!
(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=
(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!
(9分之7-18分之5)×(8分之5+4分之3)= (32+23分之8÷8-23分之1= 30-16.72-13.28=(7-5分之4×4分之3)÷5分之3= 7.2×102= 724-56×32÷28= 5.4×14+15×5.4+5.4= 20×21分之20+21分之20+8分之5= 都是简便计算!
简便计算
(9分之7-18分之5)×(8分之5+4分之3)
解,得:
==(1/2)*(11/8)
==11/16
(32+23分之8÷8-23分之1
解,得:
==
30-16.72-13.28
解,得:
==30-(16+0.72)-(13+0.28)
==30-16-0.72-13-0.28
==30-(16+13)-(0.72+0.28)
==30-29-1
==0
(7-5分之4×4分之3)÷5分之3
解,得:
==(7-0.6)*(5/3)
==32/3
7.2×102
解,得:
==72*(100+2)
==7200+144
==7344
724-56×32÷28
解,得:
==724-2×32
==724-64
==660
5.4×14+15×5.4+5.4
解,得:
==5.4×(14+15+1)
==5.4*30
==162
20×21分之20+21分之20+8分之5
解,得:
== 21分之20(20+1)+8分之5
== 21分之20*21+8分之5
== 20+8分之5
==20又5/8