来自潘建基的问题
(数学)计算下面各题,能简便的要简便.(1)15/21*3/4+10/21*3/4-3/4(2)37*3/35
(数学)计算下面各题,能简便的要简便.
(1)15/21*3/4+10/21*3/4-3/4
(2)37*3/35
1回答
2020-10-10 06:08
(数学)计算下面各题,能简便的要简便.(1)15/21*3/4+10/21*3/4-3/4(2)37*3/35
(数学)计算下面各题,能简便的要简便.
(1)15/21*3/4+10/21*3/4-3/4
(2)37*3/35
(1)15/21*3/4+10/21*3/4-3/4
=(15/21+10/21-1)*3/4
=4/21*3/4
=1/7
(2)37*3/35
=(35+2)×3/35
=35×3/35+2×3/35
=3+6/35
=3又6/35