4.68-1.3+14.14-8.7和9分之4除以【(3分之2-9分之2)乘2分之1】 怎么简算?

问题描述:

4.68-1.3+14.14-8.7和9分之4除以【(3分之2-9分之2)乘2分之1】 怎么简算?

简算
4.68-1.3+14.14-8.7
解,得:
==4.68+14.14-(8.7+1.3)
==4.68+14.14-10
==4.68+(14.14-10)
==4.68+4.14
==8.82
9分之4除以【(3分之2-9分之2)乘2分之1】
解,得:
==(4/9) /[(4/9)*(1/2)]
==1/(1/2)
==2

4.68-1.3+14.14-8.7
=(4.68+14.14)-(1.3+8.7)
=18.82-10
=8.82
9分之4除以【(3分之2-9分之2)乘2分之1】
=4/9÷(2/3*1/2-2/9*1/2)
=4/9÷(1/3-1/9)
=4/9÷2/9
=4/9*9/2
=2