4.78×1.5-0.6÷0.4简便方法,
问题描述：
4.78×1.5-0.6÷0.4简便方法,
要简便方法啊!
答
4.78×1.5-0.6÷0.4
=4.78×5/2-0.6×5/2
=5/2(4.78-0.6)
=5/2×4.18
=20.9/2
=10.45