题目内容
计算
(1)(-2)2+4×(-3)2-(-4)2÷(-2)
(2)(-
+
+
-
)×(-15×4).
(1)(-2)2+4×(-3)2-(-4)2÷(-2)
(2)(-
| 1 |
| 6 |
| 1 |
| 20 |
| 4 |
| 5 |
| 5 |
| 12 |
(1)原式=4+4×9-16÷(-2)
=4+36+8
=48;
(2)原式=(-
+
+
-
)×(-60)
=10-3-48+25
=-16.
=4+36+8
=48;
(2)原式=(-
| 1 |
| 6 |
| 1 |
| 20 |
| 4 |
| 5 |
| 5 |
| 12 |
=10-3-48+25
=-16.
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