小明在电脑中设置了一个有理数的运算程序:输入数a,加*键,再输入数b,就可以得到运算:a*b=(a-b)-|b-a|. (1) 求(-3)*2的值; (2) 求(3*4)*(-5)的值. 答案:解:(-3)*2=(-3-2)-|2-(-3)|=-5-5=-10
解:∵3*4=(3-4)-|4-3|=-2,(-2)*(-5)=[(-2)-(-5)]-|-5-(-2)|=0,∴(3*4)*(-5)=0Who knows the way her home?
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