当x=1.5，y=1.2时，求8x+5y﹣4x+y的值．
直接写出得数．========
如果从甲袋中取出千克放入乙袋中．两袋的重量刚好相等．原来甲袋比乙袋重多少千克？
看谁算得快．========
计算．= += == ﹣= == 1=
口算．．
千克放入乙袋中．两袋的重量刚好相等．原来甲袋比乙袋重多少千克？
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