问题
解答题
计算: (1)2+(-4)-(-2)+4 (2)2÷(1-
(3)5-(-2)2×2 (4)(
|
答案
(1)2+(-4)-(-2)+4=2-4+2+4=4;
(2)2÷(1-
)×(-1 3
)=2÷2 3
×(-2 3
)=2×2 3
×(-3 2
)=-2;2 3
(3)5-(-2)2×2=5-4×2=5-8=-3;
(4)(
-3 4
-1 6
)×(-48)=1 12
×(-48)-3 4
×(-48)-1 6
×(-48)=-36+8+4=-24;1 12