问题
解答题
(1)-72+2×(-3)2+(-6)÷(-
(2)2
|
答案
(1)原式=-49+2×9+(-6)×9
=-49+18-54
=-85;
(2)原式=4
-6×3 1 3
-23
=4
-23
-23
=2
-2.3
(1)-72+2×(-3)2+(-6)÷(-
(2)2
|
(1)原式=-49+2×9+(-6)×9
=-49+18-54
=-85;
(2)原式=4
-6×3 1 3
-23
=4
-23
-23
=2
-2.3