问题 解答题
计算:
(1)
2
×
32

(2)
12
+
18
-
8
-
48

(3)
3
1
3
÷
2
5
2
1
3
×4
1
2
5

(4)
12
3-
3
-
1
2+
3
答案

(1)原式=

2×32
=
64
=8;

(2)原式=2

3
+3
2
-2
2
-4
3
=
2
-2
3

(3)原式=

10
3
÷
2
5
7
3
×4
7
5
=1×
5
2
×4×
10
3
×
3
7
×
5
7
=10×
5
2
7
=
50
2
7

(4)原式=

12(3+
3
)
(3-
3
)(3+
3
)
-
2-
3
(2+
3
)(2-
3
)
=2(3+
3
)-(2-
3
)=6+2
3
-2+
3
=4+3
3

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