有理数的加减法混合运算
1.(-5又1/5)-(-2又4/7)+(-1又1/2)-(+3又4/5)+12又3/7
2.-|-2又3/8|-(+5/8)-|-1又1/6|-|-5/6|
3.已知|x-1|=3,求-3|1+x|-|x|+5的值.
人气:264 ℃ 时间:2020-04-04 02:45:47
解答
1.(-5又1/5)-(-2又4/7)+(-1又1/2)-(+3又4/5)+12又3/7=[(-5又1/5)-(+3又4/5)]+[-(-2又4/7)+12又3/7]+(-1又1/2)=[-9]+[+15]+(-1又1/2)=6-1又1/2=4又1/22.-|-2又3/8|-(+5/8)-|-1又1/6|-|-5/6|=-2又3/8-5/8-1又1/6-5/6=-...
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