用简便方法计算45除以[(156+38乘24)除以89]
问题描述:
用简便方法计算45除以[(156+38乘24)除以89]
答
45除以[(156+38乘24)除以89]
=45÷[(156+38×24)÷89]
=45÷[(24×6.5+24×38)÷89]
=45÷[24(38+6.5)÷89]
=45÷[(24×44.5)÷89]
=45÷(24×44.5)/89
=45×89/24×44.5
=45/12
=3又3/4