计算:-2+5=______,9-(-3)=______,|-4|=______.
题型:填空题难度:简单来源:不详
计算:-2+5=______,9-(-3)=______,|-4|=______. |
答案
:-2+5=3, 9-(-3)=12, |-4|=4. 故答案为:3;12;4. |
举一反三
如果|x-3|+(y+5)2=0,则x=______,y=______,xy=______. |
已知|x+3|+|y-1|=0,求(x-y)3的值. |
若|a|=1,|b|=4,且ab>0,则a2-b=______. |
已知|a-3|+(b-1)2=0,则3a+b=______. |
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