计算.(1)?17?(?27);(2)38+(?145);(3)0?(?38);(4)?123?(?212);(5)|?23|?(?15)?|?413?(?213
计算.(1)?17?(?27);(2)38+(?145);(3)0?(?38);(4)?123?(?212);(5)|?23|?(?15)?|?413?(?213)|....
计算.(1)?17?(?27);(2)38+(?145);(3)0?(?38);(4)?123?(?212);(5)|?23|?(?15)?|?413?(?213)|.
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(1)-
-(-
),
=-
+
,
=
;
(2)
+(-1
),
=-(1
-
),
=-
;
(3)0-(-
),
=0+
,
=
;
(4)-1
-(-2
),
=-1
+2
,
=2
-1
,
=
;
(5)|-23|-(-15)-|-4
-(-2
)|,
=23+15-|-4
+2
|,
=38-2,
=36.
| 1 |
| 7 |
| 2 |
| 7 |
=-
| 1 |
| 7 |
| 2 |
| 7 |
=
| 1 |
| 7 |
(2)
| 3 |
| 8 |
| 4 |
| 5 |
=-(1
| 4 |
| 5 |
| 3 |
| 8 |
=-
| 57 |
| 40 |
(3)0-(-
| 3 |
| 8 |
=0+
| 3 |
| 8 |
=
| 3 |
| 8 |
(4)-1
| 2 |
| 3 |
| 1 |
| 2 |
=-1
| 2 |
| 3 |
| 1 |
| 2 |
=2
| 1 |
| 2 |
| 2 |
| 3 |
=
| 5 |
| 6 |
(5)|-23|-(-15)-|-4
| 1 |
| 3 |
| 1 |
| 3 |
=23+15-|-4
| 1 |
| 3 |
| 1 |
| 3 |
=38-2,
=36.
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