问题
填空题
计算-1+2=______,(+1)+(-2)=______,(-
|
答案
-1+2=1;
(+1)+(-2)=1-2=-1;
(-
)-(+2)=-1 2
-2=-1 2
;5 2
2-3=-1;
(-3)2=9;
(-1)3=-1;
-12006=-1;
(-4)÷(-5)×(-
)=-4×1 5
×1 5
=-1 5
.4 25
计算-1+2=______,(+1)+(-2)=______,(-
|
-1+2=1;
(+1)+(-2)=1-2=-1;
(-
)-(+2)=-1 2
-2=-1 2
;5 2
2-3=-1;
(-3)2=9;
(-1)3=-1;
-12006=-1;
(-4)÷(-5)×(-
)=-4×1 5
×1 5
=-1 5
.4 25