3.5×5/4+1.25×27/10+3.8÷4/5

来源：百度知道 编辑：UC知道 时间：2024/05/01 18:18:56
怎么简便算???????????????????????????????????

一楼的方法最好
可惜最后结果错了
是12.5

7/2×5/4+5/4×27/10+19/5×5/4
=35/8+27/8+38/8
=100/8
=12.5

3.5×5/4+1.25×27/10+3.8÷4/5
=3.5*5/4+1.25*27/10+3.8*5/4
=5/4*(3.5+27/10+3.8)
=5/4*(3.5+2.7+3.8)
=5/4*[3.5+(2.7+3.8)]
=5/4*(3.5+6.5)
=5/4*10
=25/2
=12.5
*为乘号

3.5×5/4+1.25×27/10+3.8÷4/5
=3.5*5/4+1.25*27/10+3.8*5/4
=5/4*(3.5+27/10+3.8)
=5/4*(3.5+2.7+3.8)
=5/4*[3.5+(2.7+3.8)]
=5/4*(3.5+6.5)
=5/4*10
=25/2
=12.5
*为乘号

5/4(35/10+37/10+38/10)
=5/4(100/10)
=10 5/4