题目内容
计算:
(1)
×4+16÷(-2)2
(2)-24×(
+
-
).
(1)
| 1 |
| 8 |
(2)-24×(
| 1 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
(1)
×4+16÷(-2)2
=
+16÷4
=
+4
=4
;
(2)-24×(
+
-
)
=-24×
-24×
+24×
=-4-16+18
=-2.
| 1 |
| 8 |
=
| 1 |
| 2 |
=
| 1 |
| 2 |
=4
| 1 |
| 2 |
(2)-24×(
| 1 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
=-24×
| 1 |
| 6 |
| 2 |
| 3 |
| 3 |
| 4 |
=-4-16+18
=-2.
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