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同学们在进行有理数乘法运算时,通常想到的是利用有理数乘法和乘方的运算性质,乘法的运算律,但是有一类数的乘法可以用一些特殊的规则去处理,不需其它工具,只进行口
When students are doing rational number multiplication, what they usually think of is the arithmetic law of multiplication and multiplication of rational number multiplication and power. However, there are some kinds of multiplication that can be handled by some special rules without any other tools mouth