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4.5+1.43÷1.3-1.255.13÷1.25×0.5五年级上册简便计算

题目详情
4.5+1.43÷1.3-1.25 5.13÷1.25×0.5 五年级上册简便计算
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答案和解析
4.5+1.43÷1.3-1.25
=4.5+1.1*(1.3÷1.3)-1.25
=4.5+1.1-1.25
=450/100+110/100-125/100
=(450+110-125)/100
=435/100
=4.35
5.13÷1.25×0.5
=513×10×1÷100÷8
=513÷80
=6又33/80