怎样简便计算?动动脑经,想一想
问题描述:
怎样简便计算?动动脑经,想一想
(1.45×1/8×360÷29/4)÷ [35×(1/7+1/5)÷4/5 ]
各位大仙帮帮忙!
急
答
(1.45×1/8×360÷29/4)÷ [35×(1/7+1/5)÷4/5 ]
=【(1.45×4/29)×(1/8×360)】÷ [(35×1/7+35×1/5)÷4/5 ]
=(0.2×45)÷ [(5+7)÷4/5 ]
=9÷[12÷4/5]
=9÷15
=3/5