ร1

(R) (C) ] (R´)
(Q´) [
(I+)
(Q) (I) (N)
(I¯) (I0)

1,2, 3,...
1, 2, 3,...

0
I I ..., 3, 2, 1, 0,1,2, 3,...

a a a a b
b bb

0 b0 b0

1 , 22
2 7

..., 3, 2, 1, 0,1, 2, 3,...

1.23 = 1.23000... = 123
100

•• = 0.3232... = 32
99
0.3 2

•• = 0.38585 ... = 382
990
0.3 8 5

•• = 1.467467 ... = 1466
999
1.46 7

2, 3, 3 + 2,0.1010010001 ...,

1.

✓

10
22

3

3 − 22

7

4 3.1416
5 4 +1
6 1 − (−8)

7 6 −1
8 7

22

9 •

0.0 9

10 ( )2

2

2.
1) 1.010010001
2) 6.808808880…
3) 1− 3

4) 64 x

3 x x + 3 = −3

5) x
6)