计算:(1)248-613+512(2)(23-52)(3-22)(3)(6+12)2+(6-12)2(4)|-2|-(1+2)0+4-数学

题目简介

计算:(1)248-613+512(2)(23-52)(3-22)(3)(6+12)2+(6-12)2(4)|-2|-(1+2)0+4-数学

题目详情

计算:(1)2
48
-6
1
3
+5
12

(2)(2
3
-5
2
)(
3
-2
2
)

(3)(
6
+1
2
)
2
+(
6
-1
2
)
2

(4)|-2|-(1+
2
)0+
4
题型:解答题难度:中档来源:不详

答案

(1)2
48
-6
class="stub"1
3
+5
12

=8
3
-2
3
+10
3

=(8-2+10)
3

=16
3

(2)(2
3
-5
2
)(
3
-2
2
)

=2
3
×
3
-2
3
×2
2
-5
2
×
3
+5
2
×2
2

=6-4
6
-5
6
+20
=26-9
6

(3)(
6
+1
2
)
2
+(
6
-1
2
)
2

=
6+2
6
+1
4
+
6-2
6
+1
4

=class="stub"7
2

(4)|-2|-(1+
2
)0+
4

=2-1+2
=-1.

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