①17/35×36②53/99×98③98/99×98
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/27 20:37:05
![①17/35×36②53/99×98③98/99×98](/uploads/image/z/131123-11-3.jpg?t=%E2%91%A017%2F35%C3%9736%E2%91%A153%2F99%C3%9798%E2%91%A298%2F99%C3%9798)
①17/35×36②53/99×98③98/99×98
①17/35×36
②53/99×98
③98/99×98
①17/35×36②53/99×98③98/99×98
17/35*36
=17/35*(35+1)
=17/35*35+17/35
=17又17/35
53/99*98
=53/99*(99-1)
=53/99*99-53/99
=52又46/99
98/99*98
=98/99*(99-1)
=98/99*99-98/99
=97又1/99
下次做的时候只要把整数因数凑成和分母相同就好了