题目内容
计算:
(1)(-1)100×|-5|-4×(-3)-42;
(2)12×(-3-
+1
)+(-3)3-(-2)2÷
.
(1)(-1)100×|-5|-4×(-3)-42;
(2)12×(-3-
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
(1)(-1)100×|-5|-4×(-3)-42,
=1×5+12-16,
=5+12-16,
=17-16,
=1;
(2)12×(-3-
+1
)+(-3)2-(-2)2÷
,
=(-3)×12-
×12+1
×12-9-4×4,
=-36-3+16-9-16,
=-48.
=1×5+12-16,
=5+12-16,
=17-16,
=1;
(2)12×(-3-
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 4 |
=(-3)×12-
| 1 |
| 4 |
| 1 |
| 3 |
=-36-3+16-9-16,
=-48.
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