3又5分之4*0.375+3.8除以8+2分之1除以19分之5计算
人气：386 ℃ 时间：2019-12-08 01:42:50
解答
原式
=3.8x3/8+3.8x1/8+1/2×19/5
=3.8x(3/8+1/8)+3.8x1/2
=3.8x1/2+3.8x1/2
=3.8x(1/2+1/2)
=3.8x1
=3.8
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