先估一估商是几位数,再列竖式计算并验算。
432÷4= 586÷7= 643÷8=
Beijing is a big place __________ beautiful sights(风景).
有正义感、为人正直,这是做人应该具有的优良品德。下列名言、诗句中,不能体现这种优良品德的是 。( )
计算
(1)(13xy)2•(﹣12x2y2)÷(﹣43x3y)
(2)用简便方法计算1652﹣164×166.
To be an artist is not easy, but sometimes dreams can be a rich source of ________—for an artist.