8/17×0.8+4/5+17/9×0.8简便计算
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![8/17×0.8+4/5+17/9×0.8简便计算](/uploads/image/z/371828-20-8.jpg?t=8%2F17%C3%970.8%2B4%2F5%2B17%2F9%C3%970.8%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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8/17×0.8+4/5+17/9×0.8简便计算
8/17×0.8+4/5+17/9×0.8简便计算
8/17×0.8+4/5+17/9×0.8简便计算
原题是这样的吧:8/17×0.8+4/5+9/17×0.8
8/17×0.8+4/5+9/17×0.8
=(8/17+9/17)×0.8+4/5
=1×0.8+0.8
=1.6
0.8=4/5
=8/17*4/5+1*4/5+17/9+4/5
=4/5*(8/17+1+17/9)
=4/5*42/43
=168/215