题目内容
计算:
(1)-
×(-8+
-
);
(2)
-
;
(3)-32+5×(-
)-(-4)2÷(-8);
(4)2×[9+2(
-2)+]+
(精确到0.01).
(1)-
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 3 |
(2)
| 3 | -8 |
| 121 |
(3)-32+5×(-
| 8 |
| 5 |
(4)2×[9+2(
| 5 |
| 3 | 8 |
(1)原式=-
×(-8+
)
=-
×(-
)
=5
;
(2)原式=-2-11
=-13;
(3)原式=-9-8-16÷(-8)
=-9-8+2
=-15;
(4)原式=2×[9+2
-4]+2
=2×(5+2
)+2
=10+4
+2
≈20.94.
| 3 |
| 4 |
| 1 |
| 3 |
=-
| 3 |
| 4 |
| 23 |
| 3 |
=5
| 3 |
| 4 |
(2)原式=-2-11
=-13;
(3)原式=-9-8-16÷(-8)
=-9-8+2
=-15;
(4)原式=2×[9+2
| 5 |
=2×(5+2
| 5 |
=10+4
| 5 |
≈20.94.
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