神马作文网没学过负数悲剧啊!Determine whether the resultss of the following exp
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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) 如果能一个一个来解释怎么做就更好了,
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) 如果能一个一个来解释怎么做就更好了,
加法:负+负=负 正+正=正 正+负那个的绝对值大,就随那个的符号
乘除法:
负负得正
正负得负
负正得负
正正得正,-2+8=6,-8+2=-6,+a=a.-2x(+8)=-2x8=-16.(-8)/(-2)=8/2=4就是这么算
乘除法:
负负得正
正负得负
负正得负
正正得正,-2+8=6,-8+2=-6,+a=a.-2x(+8)=-2x8=-16.(-8)/(-2)=8/2=4就是这么算
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