: 1) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 2, 7, 6, 5*.
5 *. 25 , .
 |
I.
1) 1 25 = 25 () ;
2) 2 25 = 50 () ;
3)25 + 50 = 75 () .
II.
1) 1+ 2 = 3 (/) ;
2) 3 25 = 75 () .
, . 5 + 30 + 10 = 45 () 120 - 75 = 45 ().
6. :
) 8 = 64; ) - 8 = 64;
) : 8 = 64; ) - 64 = 8.
7. :
: 1 = 1: ( = 1)
: = : ( = )
0: = 0 ( , 0)
: 1 = 0 ( = 0)
5.
() 1, 3, 4, 8.
3. : 720: 9 , 9 720.
720: 9 = 80; 80 9 = 720 . .
4.
 |
I.
1) 1 24 = 24 () ;
2) 24: 4 = 6 (.) 6 .
II.
1) 4:1 = 4 () ; ;
2) 24: 4 = 6 (.) 6 .
8.
S = 8 2 = 16 2. 4 .
= (8 + 2) 2 = 20 . 5 .
) 9, 10.
9.
1) 360 : 3 = 120 (/) ;
2) 60 / < 120 / 2 .
120: 60 = 2 ()
7.
8.
83
. .
: 1) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 3, 8, 6*.
3. .
6 *.
6 6 = 36(2) ;
36: 2 = 18 (2) ;
18 : 9 = 2 () .
8. . 32 , .
5.
|
|
|
() 1, 4, 2, 5, 7, 9.
1. .
12: (3 2) = (12: 3): 2 = (12: 2): 3 = 2;
64: 16 = 64: (2 8) = (64: 2): 8 = (64: 8): 2 = 4 . .
2. .
 |
I.
360: 9 = 40 (.);
360: 10 = 36 ();
36:9 = 4 (.);
40 + 4 = 44 (.).
. 10 , . 10 :
360:9 = 40 (.); 40: 10 = 4 (.);
40 + 4 = 44 (.).
4.
1) 18: 2 = 9 () ABCD;
2) 9 - 3 = 6() ;
3)6-4 = 2 () .
.
7. .
34: 7 = 4 (. 6);
6<7;
47 + 6 = 28 + 6 = 34 . .
) 10, 11.
10.
(14 + 6): 2 = 10 (.) 14: 2 + 6: 2 = 10 (.)
11. 2856; 7755; 11 112; 3451.
7.
8.
84
