(1)计算:-22+(-3)2+sin30°+|1-3|+(3.14-π)0(2)计算:4a+2+a-2.-数学

题目简介

(1)计算:-22+(-3)2+sin30°+|1-3|+(3.14-π)0(2)计算:4a+2+a-2.-数学

题目详情

(1)计算:-22+(-3)2+sin30°+|1-
3
|+(3.14-π)0
(2)计算:
4
a+2
+a-2.
题型:解答题难度:中档来源:无锡新区模拟

答案

(1)原式=-4+9+class="stub"1
2
+
3
-1+1,
=5class="stub"1
2
+
3

(2)原式=class="stub"4
a+2
+class="stub"a-2
1

=class="stub"4
a+2
+
a2-4
a+2

=
a2
a+2

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