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灵活运用乘法分配律a(b+c)=ab+ac,可以提高有理数混合运算的速度和准确性.现举例说明.1.正向用例1计算:(3/4-7/8-5/(12)×(-24).分析按运算法则,应先通分,后计算括号
Applying the multiplicative distribution law a(b+c)=ab+ac flexibly can improve the speed and accuracy of rational number mixed operations. Here is an example. 1. Positive use case calculation: (3/4-7/8-5/ (12) × (-24). Analysis According to the algorithm, it should pass through first and then calculate the brackets.