没学过负数悲剧啊!Determine whether the resultss of the following expressions are positive or negative number.-2+8,-8+2,(+2)+(+8),(-2)+(-8),(-2)-(-8),(-2)×(+8),(-8)÷(-2)

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没学过负数悲剧啊!Determine whether the resultss of the following expressions are positive or negative number.-2+8,-8+2,(+2)+(+8),(-2)+(-8),(-2)-(-8),(-2)×(+8),(-8)÷(-2)

没学过负数悲剧啊!Determine whether the resultss of the following expressions are positive or negative number.-2+8,-8+2,(+2)+(+8),(-2)+(-8),(-2)-(-8),(-2)×(+8),(-8)÷(-2)
没学过负数悲剧啊!
Determine whether the resultss of the following expressions are positive or negative number.
-2+8,-8+2,(+2)+(+8),(-2)+(-8),(-2)-(-8),(-2)×(+8),(-8)÷(-2)

没学过负数悲剧啊!Determine whether the resultss of the following expressions are positive or negative number.-2+8,-8+2,(+2)+(+8),(-2)+(-8),(-2)-(-8),(-2)×(+8),(-8)÷(-2)
-2+8=6
-8+2=-6
(+2)+(+8)=+10
(-2)+(-8)=-10
(-2)-(-8)=6
(-2)×(+8)=-16
(-8)÷(-2)=4

把负数当做正数取反……
做加减运算时,遇见负数+当做-;-当做+……
做乘除运算时,同号为正,异号为负……
上题的答案 -2+8=6 -8+2=-6 2+8=10 -2--8=6 -2*8=-16 -8/-2=4