题目内容
用简便方法计算:
(1)(2
)2×42
(2)(-0.25)12×412
(3)0.52×25×0.125
(4)[(
)2]3×(23)3
(1)(2
| 1 |
| 4 |
(2)(-0.25)12×412
(3)0.52×25×0.125
(4)[(
| 1 |
| 2 |
(1)原式=
×42=92=81;
(2)原式=(-
)12×412=
×412=1;
(3)原式=(
)2×25×
=
;
(4)原式=(
)3×83=(
×8)3=8.
| 92 |
| 42 |
(2)原式=(-
| 1 |
| 4 |
| 1 |
| 412 |
(3)原式=(
| 1 |
| 2 |
| 1 |
| 8 |
| 25 |
| 32 |
(4)原式=(
| 1 |
| 4 |
| 1 |
| 4 |
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