问题 填空题
计算:
64
=______;若
a
b
=
2
3
,则
2a-b
b
=______;
63
=______.
答案

64
=8,

a
b
=
2
3

∴设a=2k,b=3k,

2a-b
b
=
4k-3k
3k
=
1
3

63
=
32
=3
7

故答案为:8,

1
3
,3
7

单项选择题 B1型题
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