题目内容
计算:
(1)(
)99×1625;
(2)(0.5×3
)2006×(-2×
)2007;
(3)0.12520×420×220;
(4)(
×
×
×…×
×1)10×(10×9×8×…×2×1)10.
(1)(
| 1 |
| 2 |
(2)(0.5×3
| 2 |
| 3 |
| 3 |
| 11 |
(3)0.12520×420×220;
(4)(
| 1 |
| 10 |
| 1 |
| 9 |
| 1 |
| 8 |
| 1 |
| 2 |
考点:整式的混合运算
专题:
分析:(1)根据幂的乘方进行变形,再根据积的乘方进行计算,最后求出即可;
(2)变形后根据积的乘方进行计算,求出后再求出即可;
(3)先根据积的乘方进行计算,再求出即可;
(4)先根据积的乘方进行计算,再求出即可.
(2)变形后根据积的乘方进行计算,求出后再求出即可;
(3)先根据积的乘方进行计算,再求出即可;
(4)先根据积的乘方进行计算,再求出即可.
解答:解:(1)原式=(
)99×(24)25
=(
)99×2100
=(
)99×299×2
=(
×2)99×2
=1×2
=2.
(2)原式=(0.5×
)2006×(-2×
)2006×(-2×
)
=[
×
×(-2)×
]2006×(-
)
=(-1)2006×(-
)
=1×(-
)
=-
.
(3)原式=(
)20×420×220
=(
×4×2)20
=120
=1.
(4)原式=[(
×
×
×…××1)×(10×9×8×…×2×1)]10
=(
×10×
×9×
×8×…×
×2×1×1)10
=110
=1.
| 1 |
| 2 |
=(
| 1 |
| 2 |
=(
| 1 |
| 2 |
=(
| 1 |
| 2 |
=1×2
=2.
(2)原式=(0.5×
| 11 |
| 3 |
| 3 |
| 11 |
| 3 |
| 11 |
=[
| 1 |
| 2 |
| 11 |
| 3 |
| 3 |
| 11 |
| 6 |
| 11 |
=(-1)2006×(-
| 6 |
| 11 |
=1×(-
| 6 |
| 11 |
=-
| 6 |
| 11 |
(3)原式=(
| 1 |
| 8 |
=(
| 1 |
| 8 |
=120
=1.
(4)原式=[(
| 1 |
| 10 |
| 1 |
| 9 |
| 1 |
| 8 |
=(
| 1 |
| 10 |
| 1 |
| 9 |
| 1 |
| 8 |
| 1 |
| 2 |
=110
=1.
点评:本题考查了整式的混合运算,幂的乘方和积的乘方的应用,主要考查学生能否运用恰当的方法进行计算和求值.
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