687+456=※704﹣487=※568+946=840﹣473=457×5=506×6=※56÷9=20÷7=
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．．
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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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