题目内容
计算成本:(1)(
+
)+(
-2
)
(2)|-3|-
+(-
)0-(-
)-1
| 48 |
| 20 |
| 12 |
| 5 |
(2)|-3|-
| 4 |
| 2 |
| 1 |
| 3 |
(1)原式=(4
+2
)+(2
-2
)
=4
+2
+2
-2
=6
.
(2)原式=3-2+1+3
=5.
| 3 |
| 5 |
| 3 |
| 5 |
=4
| 3 |
| 5 |
| 3 |
| 5 |
=6
| 3 |
(2)原式=3-2+1+3
=5.
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