五年级上册新北师大版数学优质课《倍数和因数》ppt课件免费下载
五年级上册新北师大版数学优质课《倍数和因数》ppt课件免费下载第4页

运动会上两个班同学分别排出下面两种队形,算一算两个班各有多少人。

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9×4=36(人)

5×7=35(人)

认一认

9×4=36,36是9和4的倍数,9和4是36的因数。