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解1、3/8*2/3=4X 4X=1/4 X=1/16 解2、6*7=2X 2X=42 X=21 解3、0.8X=0.3*0.4 0.8X=0.12 X=0.15 解4、1.5X=0.75*6 1.5X=4.5 X=3
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