Question

30x23/28简便方法运算

Answer 1

30 X 23/28
= 23 X 30 / 28
= 23 X 15 / 14
= 23 X ( 1 + 1/14 )
= 23 + 23/14
= 23 + 14/14 + 9/14
= 24 + 9/14