问题:
计算:
(1) (
1
3
-
5
21
+
3
14
)×(-42)
(2) -16-|-5|+2×(-
1
2
)2.
计算:
(1) (
-
+
)×(-42)
(2) -16-|-5|+2×(-
)2.
(1) (
1 |
3 |
5 |
21 |
3 |
14 |
(2) -16-|-5|+2×(-
1 |
2 |
参考答案: