问题 解答题
计算:
(1)(
12
+
18
)×2
6

(2)(4
15
-3
5
)÷2
5

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

(4)(
6
+
3
)2

(5)(2
6
-3
2
)2

(6)(3
3
+2
2
)(3
3
-2
2
)
答案

(1)原式=(2

3
+3
2
)×2
6

=2

3
×2
6
+3
2
×2
6

=12

2
+12
3

(2)原式=4

15
÷2
5
-3
5
÷2
5

=2

3
-
3
2

(3)原式=(2

5
2-4
5
+6
5
-6

=20-4

5
+6
5
-6

=14+2

5

(4)原式=6+2

6
×
3
+3

=9+6

2

(5)原式=24-2×2

6
×3
2
+18

=42-24

3

(6)原式=(3

3
2-(2
2
2

=27-8

=19.

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