计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/14 17:24:30
计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?计算(25/88-5/108+5/144)*(9/25-

计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?
计算(25/88-5/108+5/144)*(9/25-9/5)怎么做?

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