能用简便方法计算的用简便方法计算
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9.8/14 = 4.9/7 = 0.7
(6.4+3.2)/8 = 0.8 + 0.4 = 1.2
35/(9*0.35*4) = 1/(36*0.01) = 100/36 = 25/9
63.2*0.1+6.32*9 = 6.32 + 6.32*9 = 6.32*(1+9) = 6.32*10 = 63.2
(6.4+3.2)/8 = 0.8 + 0.4 = 1.2
35/(9*0.35*4) = 1/(36*0.01) = 100/36 = 25/9
63.2*0.1+6.32*9 = 6.32 + 6.32*9 = 6.32*(1+9) = 6.32*10 = 63.2
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