问题 解答题
计算:
(1)
1.44
-
1.21

(2)
8
+
32
-
2

(3)
1
3
+
27
×
9

(4)
2
12
+
3
3
+(1-
3
)0

(5)(
5
-
7
)(
5
+
7
)+2

(6)
1452-242
答案

(1)原式=1.2-1.1

=0.1;

(2)原式=2

2
+4
2
-
2

=5

2

(3)原式=

3
3
+3
3
×3

=

28
3
3

(4)原式=

4
3
+
3
3
+1

=5+1

=6;

(5)原式=5-7+2

=0;

(6)原式=

(145+24)(145-24)

=

169×121

=

169
×
121

=13×11

=143.

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