题目内容
计算:
(1)(
-
+
)×(-42)
(2)-16-|-5|+2×(-
)2.
(1)(
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
(2)-16-|-5|+2×(-
| 1 |
| 2 |
(1)(
-
+
)×(-42)
=-14+10-9,
=-13;
(2)-16-|-5|+2×(-
)2
=-1-5+2×
=-5
.
| 1 |
| 3 |
| 5 |
| 21 |
| 3 |
| 14 |
=-14+10-9,
=-13;
(2)-16-|-5|+2×(-
| 1 |
| 2 |
=-1-5+2×
| 1 |
| 4 |
=-5
| 1 |
| 2 |
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