摘要:20.计算下列各题. (1)(,(2) , (3) -3,(4) -14-.
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计算下列各题:
(1)8+(-
)-5-(-0.25);
(2)(-24)×[
-
+
];
(3)[-1
] +[-
] ÷[-
];
(4)-23÷[
]2-(-3)2×
.
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(1)8+(-
| 1 |
| 4 |
(2)(-24)×[
| 7 |
| 12 |
| 5 |
| 6 |
| 2 |
| 3 |
(3)[-1
| 2 |
| 3 |
| 7 |
| 2 |
| 5 |
| 4 |
(4)-23÷[
| 2 |
| 3 |
| 25 |
| 9 |
计算下列各题
(1)(-7)+(+15)-(-25);
(2)1-22×5÷(-
);
(3)(-3)2-[(-
)+(-
)]÷
;
(4)0.25×(-2)3-[4÷(-
)2+1]+(-1)2005.
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(1)(-7)+(+15)-(-25);
(2)1-22×5÷(-
| 1 |
| 5 |
(3)(-3)2-[(-
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 12 |
(4)0.25×(-2)3-[4÷(-
| 2 |
| 3 |