0.125×5.6+1/8×2.4
＝0.125×5.6+0.125×2.4
＝0.125×(5.6+2.4)
＝0.125×8
＝1
0.125X5.6+1/8X2.4 ==> 1/8X5.6+1/8X2.4 == > 1/8X(5.6+2.4) = 1/8X8 = 1
这么简单都不会
0.125＊5.6+1/8＊2.4
=125/1000＊5.6+1/8＊2.4
=1/8＊5.6+1/8＊2.4
=1/8＊（5.6+2.4）
=1/8＊8
=1
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