= = = = = = = = ．
68×215＞208×71． ．
350×9表示 个 相加，还表示 的 倍．
①130×25 ②120×35 ③34×350 ④300×20 ⑤420×45 ⑥284×75 ⑦115×28 ⑧50×40 ⑨150×60 积的末尾有1个0 积的末尾有2个0 积的末尾有3个0 ．
12个百是 ；45的4倍是 ．
450×70的积是末尾有 个零．
= 
= 
= 
= 
= 
= 
= 
= ．
粤公网安备 44130202000953号