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:2024/11/10 10:51:51
计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?
(25/88-5/108+5/144)*(9/25-9/5)
=5/4×(5/22-1/27+1/36)×9/5×(1/5-1)
=9/4×(5/22-1/27+1/36)×(-4/5)
=-9/5×(5/22-1/27+1/36)
=-1/5×(45/22-1/3+1/4)
=-1/5×(45/22-1/12)
=-1/10×(45/11-1/6)
=-1/10×(270-11)/66
=-259/660