题目内容
计算:
①
-2×(
)-1+|-3|+(
-1)0;
②2
+4
-
-
;
③(
-3
)(
+4
)-(
-
)2.
①
| 4 |
| 1 |
| 2 |
| 2 |
②2
| 12 |
|
| 48 |
|
③(
| 48 |
| 2 |
| 18 |
| 3 |
| 3 |
| 2 |
①原式=2-2×2+3+1
=2;
②原式=4
+
-4
-
=-
;
③原式=(4
-3
)(4
+3
)-(5-2
)
=48-18-5+2
=25+2
.
=2;
②原式=4
| 3 |
| 4 |
| 9 |
| 3 |
| 3 |
| 2 |
| 3 |
| 3 |
=-
| 2 |
| 9 |
| 3 |
③原式=(4
| 3 |
| 2 |
| 3 |
| 2 |
| 6 |
=48-18-5+2
| 6 |
=25+2
| 6 |
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