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简便方法:1.8分之7*4分之1+0.25*0.125 2.15分之2*[12.6-(5分之33+0.125/12.56

来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/20 03:12:26
简便方法:1.8分之7*4分之1+0.25*0.125 2.15分之2*[12.6-(5分之33+0.125/12.56%)] (/ 是除号)
简便方法:1.8分之7*4分之1+0.25*0.125 2.15分之2*[12.6-(5分之33+0.125/12.56
1.8分之7*4分之1+0.25*0.125
=(7/8)*(1/4)+(1/4)*(1/8)
=(1/4)(7/8+1/8)
=1/4
2.15分之2*[12.6-(5分之33+0.125/12.56%)]
=(2/15)*12.6-(2/15)*(33/5)-(2/15)*0.125/0.1256
=1.68-0.88-0.13
=0.8-0.13
=0.67
=