(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 b0 b0
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)