列竖式计算，带★的要验算．
423+349= ★409+394= 301﹣84=
900﹣461= 646+263= ★708﹣379=
30÷7= 64÷9= 74÷9=
列竖式计算，带★的要验算．
423+349= ★409+394= 301﹣84=
900﹣461= 646+263= ★708﹣379=
30÷7= 64÷9= 74÷9=
试题篮
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