用竖式计算，带*验算．620﹣338= *324+189= 67÷8= 537+256= *900﹣522= 46÷6=
2个是多少？
6×= ×= ×3= += ×= ×=
直接写得数．①4×= ②×= ③×28= ④﹣=⑤7×= ⑥0×= ⑦+= ⑧×=⑨×= ⑩×= （11）1×= （12）0.125×8=
直接写得数：15× × × × ×121 ×．
直接写出得数．×= ×= ×=×28= += （+）×12=
是多少？
= 
×
= 
×3= 
+
= 
×
= 
×
=
= ②
×
= ③
×28= ④
﹣
=
= ⑥0×
= ⑦
+
×
= ⑩
×
= （11）1×
= （12）0.125×8=
×
×
×
×121 
×
．
×
= 
×
= 
×
=
×28= 
+
= （
+
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