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www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com运用了乘法分配律。25×12=25×2+25×10502512×2503002.观察下面的竖式,说说在计算的过程中运用了什么运算定律。课堂检测三教材做一做
www.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.comwww.youyi100.com√√巩固练习四教材P27T43.
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