19/25*76 (3/7-1/34)*7-27/34 能简便的要简算,谢
问题描述:
19/25*76 (3/7-1/34)*7-27/34 能简便的要简算,谢
答
1.
76=4*19
19/25*76=19/19/(4*25)=1/100
2.
(3/7-1/34)*7-27/34 =3/7*7-7/34-27/34
=3-(7/34+27/34)=3-1=2