[小学四年级不少于30个单词的my shoe的英语作文]Yesterday was Sunday. I and my father, mother, sister, brother went to Lin'an by bus. In the morning we came down the mountain. I saw wooded mountains, wild flo...+阅读

、-9(x-2)-y(x-5)

(1)化简整个式子。 （2）当x=5时，求y的解。 2、5(9+a)*b-5(5+b)*a

(1)化简整个式子。 （2）当a=5/7时，求式子的值。 3、62g+62(g+b)-b

(1)化简整个式子。 （2）当g=5/7时，求b的解。 4、3(x+y)-5(4+x)+2y

(1)化简整个式子。 5、（x+y）(x-y)

(1)化简整个式子。 6、2ab+a*a-b

(1)化简整个式子。 7、5.6x+4(x+y)-y

(1)化简整个式子。 8、6.4(x+2.9)-y+2(x-y)

(1)化简整个式子。 9、（2.5+x）(5.2+y)

(1)化简整个式子。

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