题目内容
计算
(1)(-
)12÷(-
)9
(2)(
)-2-(-1999)0÷(-
)2
(3)a4-a4+(a2)4-(-3a4)2
(4)(-8)2009×0.1252010.
(1)(-
| 2 |
| 3 |
| 2 |
| 3 |
(2)(
| 1 |
| 2 |
| 1 |
| 3 |
(3)a4-a4+(a2)4-(-3a4)2
(4)(-8)2009×0.1252010.
(1)原式=(-
)3=-
;
(2)原式=4-1÷
=4-9=-5;
(3)原式=a8+a8-9a8=-7a8;
(4)原式=(-8×0.125)2009×0.125=-0.125.
| 2 |
| 3 |
| 8 |
| 27 |
(2)原式=4-1÷
| 1 |
| 9 |
(3)原式=a8+a8-9a8=-7a8;
(4)原式=(-8×0.125)2009×0.125=-0.125.
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