题目内容
(1)8+(-10)+(-2)-(-5);
(2)(-2)÷
×(-3);
(3)-24×(-
+
-
);
(4)(-3)2+[20-(-2)3]÷(-3).
(2)(-2)÷
| 1 |
| 3 |
(3)-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
(4)(-3)2+[20-(-2)3]÷(-3).
(1)原式=8-10-2+5
=1;
(2)原式=-2×3×(-3)
=18;
(3)原式=-24×(-
)-24×
-24×(-
)
=12-18+8
=2;
(4)原式=9+(20+8)÷(-3)
=9-
=-
.
=1;
(2)原式=-2×3×(-3)
=18;
(3)原式=-24×(-
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 3 |
=12-18+8
=2;
(4)原式=9+(20+8)÷(-3)
=9-
| 28 |
| 3 |
=-
| 1 |
| 3 |
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