题目内容
计算:(1)1-(-
)2-(-
); (2)-22+[18-(-3)×2]÷4.
| 1 |
| 2 |
| 3 |
| 4 |
(1)原式=1-
+
=1+
=
;
(2)原式=-4+(18+6)×
=-4+24×
=-4+6
=2.
| 1 |
| 4 |
| 3 |
| 4 |
=1+
| 1 |
| 2 |
=
| 3 |
| 2 |
(2)原式=-4+(18+6)×
| 1 |
| 4 |
=-4+24×
| 1 |
| 4 |
=-4+6
=2.
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