18.9-18.9/1.4的简便算法
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![18.9-18.9/1.4的简便算法](/uploads/image/z/1085085-45-5.jpg?t=18.9-18.9%2F1.4%E7%9A%84%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95)
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18.9-18.9/1.4的简便算法
18.9-18.9/1.4的简便算法
18.9-18.9/1.4的简便算法
18.9(1-1/4)=(19-0.1)3/4=14.175
0
18.9-18.9/1.4
=18.9(1-1/1.4)
=18.9(1-10/14)
=18.9(1-5/7)
=18.9*2/7
=(18.9/7)*2
=2.7*2
=5.4