(999/1000)*(1/100)+(111/1000)*(27/100)简算!
问题描述:
(999/1000)*(1/100)+(111/1000)*(27/100)简算!
答
999/1000x1/100+111/1000x27/100
=999/1000x1/100+111/1000x9x3/100
=999/1000x(1/100+3/100)
=999/1000x1/25
=999/25000