计算:(1)75-108+54-3(2)(4+23)(4-3)(3)1848-(23412-234)(4)15[(5+12)2-(5-12)2]-数学

题目简介

计算:(1)75-108+54-3(2)(4+23)(4-3)(3)1848-(23412-234)(4)15[(5+12)2-(5-12)2]-数学

题目详情

计算:
(1)
75
-
108
+
54
-
3

(2)(4+2
3
)(4-
3

(3)
1
8
48
-(
2
3
4
1
2
-2
3
4

(4)
1
5
[(
5
+1
2
2-(
5
-1
2
2]
题型:解答题难度:中档来源:不详

答案

(1)原式=5
3
-6
3
+3
6
-
3

=3
6
-2
3

(2)原式=16-4
3
+8
3
-2
3
3

=10+4
3

(3)原式=class="stub"1
8
×4
3
-(class="stub"2
3
class="stub"9
2
-2•
3
2

=
3
3
2
-
2

(4)原式=
5
5
[(
5
+1
2
+
5
-1
2
)(
5
+1
2
-
5
-1
2
)]
=
5
5
5

=1.

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