问题 填空题
计算:
169
=______   
 ②-
36
=______   
 ③±
(-5)2
=______
±
64
81
=______   
 ⑤±
0.49
=______   
 ⑥±
13
4
9
=______
(    )
=7   
 ⑧±
(    )
=±5    
 ⑨
( )2
=6.
答案

169
=13;

-

36
=-6;

±

(-5)2
=±5;

±

64
81
8
9

±

0.49
=±0.7;

±

13
4
9
11
3

49
=7;

⑧±

25
=±5

(±6)2
=6.

故答案为:①13;②-6;③±5;④±

8
9
;⑤±0.7;⑥±
11
3
;⑦49;⑧25;⑨±6

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