题目内容
计算:
(1)-6+15-7+3;
(2)60×(
+
-
);
(3)(-2)2×5-(-2)3÷4;
(4)
-
+|1-
|.
(1)-6+15-7+3;
(2)60×(
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 15 |
(3)(-2)2×5-(-2)3÷4;
(4)
| 4 |
| 9 |
| 3 |
(1)原式=18-13=5;
(2)原式=60×
+60×
-60×
=50+45-28
=67;
(3)原式=4×5-(-8)×
=-20+2
=-18;
(4)原式=2-3+
-1
=
-2.
(2)原式=60×
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 15 |
=50+45-28
=67;
(3)原式=4×5-(-8)×
| 1 |
| 4 |
=-20+2
=-18;
(4)原式=2-3+
| 3 |
=
| 3 |
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