先化简,再求比值 28/11 400:25 0.45:0.5 0.7/14怎样简便就怎样算9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2
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![先化简,再求比值 28/11 400:25 0.45:0.5 0.7/14怎样简便就怎样算9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2](/uploads/image/z/247020-60-0.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E6%AF%94%E5%80%BC+28%2F11+400%EF%BC%9A25+0.45%EF%BC%9A0.5+0.7%2F14%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E5%B0%B1%E6%80%8E%E6%A0%B7%E7%AE%979%2F7%C3%B711%2F6%EF%BC%8B2%2F9%C3%976%2F11+5%C3%B75%2F7-5%2F7%C3%971%2F5+5%2F16%EF%BC%8B%287%2F16-1%2F4%29%C3%B71%2F2)
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先化简,再求比值 28/11 400:25 0.45:0.5 0.7/14怎样简便就怎样算9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2
先化简,再求比值 28/11 400:25 0.45:0.5 0.7/14
怎样简便就怎样算
9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5
5/16+(7/16-1/4)÷1/2
先化简,再求比值 28/11 400:25 0.45:0.5 0.7/14怎样简便就怎样算9/7÷11/6+2/9×6/11 5÷5/7-5/7×1/5 5/16+(7/16-1/4)÷1/2
28/11=28:11=2又7/11
400:25 =16:1=16
0.45:0.5 =9:10=9/10
0.7/14=1:20=1/20
(注:第一步是化简,第二步是求比值)
9/7÷11/6+2/9×6/11
=7/9×6/11+2/9×6/11
=(7/9+2/9)×6/11
=1×6/11
=6/11
5÷5/7-5/7×1/5
=7-1/7
=6又6/7
5/16+(7/16-1/4)÷1/2
=5/16+7/16×2-1/4×2
=5/16+7/8-1/2
=11/16