1、蚂蚁做操(两位数、三位数乘一位数的笔算乘法)
姓名:
一、每行有12只小蚂蚁,有4行,一共有多少只蚂蚁?圈一圈,算一算。
12×4=
● ● ● ● ● ● ● ● ● ● ● ● 算式:
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2、
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答:
二、圈一圈,算一算。
12×3=
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1 2
× 3
□×□…… □□……□×□
三、小明家离学校221米,每天上学往返学校2次。小明每天上学一共要走多少米?
【挑战自己】
小马虎在计算一道乘法算式题时,把312看成了321,结果比原来的积大了27,正确的得数是多少?