我能列竖式计算．我还能给带★的算式验算呢！★812÷2= 603×4= 439×7= 602÷2=
直接写出得数．+= 1﹣=﹣=+=﹣=﹣0=+=+=++=++=
直接写得数.﹣=+= 3﹣=+=
请选择合适的方法计算下面各题． 1﹣﹣﹣+++﹣﹣+﹣．
直接写出得数： ①= ②= ③= ④= ⑤= ⑥= ⑦= ⑧=
直接写得数．+=+=+=﹣=+= 0.4+=﹣=﹣=+=+=
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