题目内容
计算下列各题.(1)
1 |
3 |
0.09 |
1 |
5 |
0.25 |
(2)
(-
|
(-6)2 |
1-(
|
(3)
3 | -1 |
3 | (-1)2 |
(-1)2 |
(4)
2 |
2 |
(-16)2 |
1 |
2 |
3 | -8 |
分析:(1)(2)(3)(4)运用二次根式的混合运算法则计算即可求解.
解答:解:(1)原式=
+
=
×
+
×
=
=0.2;
(2)原式=
-6+
=-
;
(3)原式=-1+1+1
=1;
(4)原式=
+|
-2|-
÷(-
)×
=
+2-
-16÷(-
)×(-2)
=2-64
=-62.
1 |
3 |
0.09 |
1 |
5 |
0.25 |
=
1 |
3 |
3 |
10 |
1 |
5 |
1 |
2 |
=
2 |
10 |
=0.2;
(2)原式=
1 |
5 |
3 |
5 |
=-
26 |
5 |
(3)原式=-1+1+1
=1;
(4)原式=
2 |
2 |
(-16)2 |
1 |
2 |
3 | -8 |
=
2 |
2 |
1 |
2 |
=2-64
=-62.
点评:本题主要考查了实数的综合运算能力,是各地中考题中常见的计算题型.解决此类题目的关键是熟练掌握二次根式、绝对值等考点的运算.
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