(39.6×478-3.6)÷(39.5×479+4.7)
问题描述:
(39.6×478-3.6)÷(39.5×479+4.7)
答
(39.6×478-3.6)÷(39.5×479+4.7),
=[39.6×(479-1)-3.6]÷[(39.6-0.1)×479+4.7],
=[39.6×479-43.2]÷[39.6×479-43.2],
=1.