I .
.
.
| + = + | + ( + ) = ( + ) + |   ( + ) = +
| |
| = | ( ) = ( ) | ||
: + 0 = 0 + = ; 1 = 1 = ;  0 = 0 = 0.
|
.
(+), :
 + ( + ) = + + ;
|
| (-), : - ( + ) = - - ; |
, , , .
, .
, .
.
| , . | |
| ( ) , . |
.
| 8 -9 (4 5) = 12 +(4 + 5) | ||
| 8 -9 4 + 5 = 12 + 4 + 5 | (!) | |
| 8 4 - 12 - 5 = 4 + 9 - 5 | , . (!) | |
| 8 4 - 12 - 5 = 4 + 9 - 5 | ||
| - 13 = 8 | . | |
= -  .
|
.
1.:
) 
+ 
; ) -4,5 - 2 
; ) -1,2 (-0,4); ) 
.
2. : (3 5)y, =2, y = -8.
3. :
, 7 . . 6, 4?
4. S = v (t + 1) t.
7. : ) (7 + 1) (9 + 3) = 5; ) 
= 
.
8. 2, 5. , 48 / .
9. 2 2 . , 10.
.
1. .
? . . . . . . . . . . . . , , . . . . . . . . .
|
|
|
: 7 1. .
I .
.
 |
| . | |||||||
 b
| . | ||||||
| α, β, γ | |||||||
A D
| , (.) | - , = + . | |||||
| , . . | ||||||
A
 O B
| , . | , < = < + < | |||||
 α
α < 90 | 
  β
β = 90
|  
γ
180 > γ > 90
|
< = 180
| ||||
| , , . | 180. | |||||
  C
D
| , , , . | . | |||||
.
, , : ) ; ) N.
2.
3.
4.
5.
6.
7.
8.
9.
10.
DC DK. DM ADC. ADK, < CDK = 52, < D = 68.
11.
O
, D
12.
