3. .
- .
- .
1, 3,4, 7, 6, 2, 5*.
1. .
2. , . ( 11 15 .) ?
11 15 - 10 50 = 10 75 - 10 50 = 25
3. -.
| ? ? ? | 5 5 | 90 . 100 . |
I. .
: 100: 5 - 90: 5 = (100 - 90): 5 (100-90): 5 = 100: 5-90: 5.
.
4.
. 2--------------------- 1
. ? , 3 '
?
, .
5*.
1) > 356, = 356. , 356 > 356.
2) 500 + b> 800. b 500 + b= 800? (b = 300.) b, 500 + b> 800 ? b = 300.)
|
3) 190 > 300. .
= 0, 190 > 300 , 0 < 300.
= 1, 190 > 300 , 190 < 300.
= 2, 190 > 300 , 380 > 300.
: = 1.
6.
?
12 ?, 4 ,
7. .
.
.
8, 9.
89. . .(. 46-47)
: 1) ;
2) .
3) .
.
.
3. .
.
.
1,2,6, 3, 5*
2.
I. (6 4): 2 = 12 (.)
II. 2 , . , 2 , .
62 = 12 (.)
.
3. AC, AD, , OD 4.
5*. 12 , 6
12 , .
| ? | 6 | 18 | |
| ? | 6 | ?, 12 |
I.
1) 18-12 = 6 () ;
2) 6: 6 = 1 (/) .
II.
1) 18:6 = 3 (/) ;
2) 12: 6 = 2 (/) 1 ;
|
|
|
3) 3 - 2 = 1 (/) .
6.
<356, = 355.
500 + b < 800, 500 + b= 800, b= 300.
b= 300 . 1, (b = 299).
190 + <300, 190 + = 300, = 110.
=110 , = 109 .
.
.
7, 8.
7.
?
750
?, 3 30
90. . .(.48-49)
: 1) ;
2) .
3) .
.
