问题
解答题
计算: (1)(-4)-(+11)-(-9) (2)(1
(3)4
|
答案
(1)原式=-4-11+9=-6;
(2)原式=-36+9-14=-41;
(3)原式=
÷[9÷(-2)+2]=9 2
÷(-9 2
+2)=9 2
×(-9 2
)=-2 5
.9 5
计算: (1)(-4)-(+11)-(-9) (2)(1
(3)4
|
(1)原式=-4-11+9=-6;
(2)原式=-36+9-14=-41;
(3)原式=
÷[9÷(-2)+2]=9 2
÷(-9 2
+2)=9 2
×(-9 2
)=-2 5
.9 5