|
|
( 0 1) : 1 . , , . , , ( ) . – . , 200:
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43,
47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,
103, 107, 109, 113, 127, 131, 137, 139, 149, 151,
157, 163, 167, 173, 179, 181, 191, 193, 197, 199.
: |
|
|
() : m + n = n + m . .
() : m · n = n · m . .
() : ( m + n ) + k = m + ( n + k ) = m + n + k . .
() : ( m · n ) · k = m · ( n · k ) = m · n · k . .
() : ( m + n ) · k = m · k + n · k . .
: |
|
|
, . , , , – , , . . , 11 + 6 = 17. 11 6 – , 17 – . , : 11 + 6 = 17 6 + 11 = 17.
, , . () () - (), : 17 – 6 = 11. 17 – , 6 – , 11 – .
: |
|
|
2, 4, 8, 3, 9, 6, 5, 25, 10, 100, 1000, 11.
2. 2, - 2. , , , – .
4. 4, - , 4.
8. 8, - , 8.
3 9. 3, 3. 9, 9.
6. 6, 2 3.
5. 5, - 5.
25. 25, - , 25.
10. 10, - .
100. 100, – .
1000. 1000, – .
11. 11 , , , , , , 11.
, .
. 378015 3, :
3 + 7 + 8 + 0 + 1 + 5 = 24, 3.
5, 5. ,
11, :
3 + 8 + 1 = 12 7 + 0 + 5 = 12 .
2, 4, 6, 8, 9, 10, 25, 100 1000, …
: |
|
|
- 1 10 1 10. , , . 6 4- ! .
1 - 10.
1 :
11 = 1
12 = 1
13 = 1
14 = 1
15 = 1
16 = 1
17 = 1
18 = 1
19 = 1
110 = 1
: |
|
|
- , . . 0 - 10, , , . . 6 - , .
1 - 10.
× | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
2 | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
3 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 |
4 | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | 40 |
5 | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
6 | 6 | 12 | 18 | 24 | 30 | 36 | 42 | 48 | 54 | 60 |
7 | 7 | 14 | 21 | 28 | 35 | 42 | 49 | 56 | 63 | 70 |
8 | 8 | 16 | 24 | 32 | 40 | 48 | 56 | 64 | 72 | 80 |
9 | 9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 | 90 |
10 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 100 |
: |
: | [1] |