题目内容
计算:
(1)(-1)2×23-(-4)÷2;(2)25×
-(-25)×
+25×(-
).
(1)(-1)2×23-(-4)÷2;(2)25×
3 |
4 |
1 |
2 |
1 |
4 |
(1)(-1)2×23-(-4)÷2
=1×8+4×
=8+2
=10;
(2)25×
-(-25)×
+25×(-
)
=25(
+
-
)
=25×1
=25.
=1×8+4×
1 |
2 |
=8+2
=10;
(2)25×
3 |
4 |
1 |
2 |
1 |
4 |
=25(
3 |
4 |
1 |
2 |
1 |
4 |
=25×1
=25.
![](http://thumb.zyjl.cn/images/loading.gif)
练习册系列答案
相关题目