: 1) ( );
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 4, 6*, 5.
5. 300 2, 120 2. , 10 , .
1) 300 : 10 = 30 () ;
2) 120: 30 = 4 () .
6*. . :
24: 2 = 12 (/) ;
1 = 60 ; 4 ∙ 4 = 16 (/) .
: , .
5.
() 1, 2, 3, 7.
2.
 |
: 8 , 6 .
) 8, 9.
8.
 | |||
 | |||
1) 18 9 = 162() 9 ;
2) 17 - 9 = 8 () 17 ;
3) 
17 8 = 136 () 8 ;
4) 162 + 136= 298 () .
. :
1) 18 ∙ 17 = 306() , 17 18 ;
2) 17 - 9 = 8 () 17 ;
3) 18 17= 1 () ;
4) 1 ∙ 8 = 8 () 8 ;
5) 306 - 8 = 298 () .
7.
8.
73
. .
: 1 ) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 5*, 8, 9, 6*, 4.
5*. .
 |
: 14 , 22 .
4. ) 20 = 200 000 2; 7 = 70 000 2;
) 7 2 = 700 2, 6 2 3 2 = 603 2, 100 2 = 10 000 2.
6*.
7*57 < 7864 (5, 6, 7, 8); 25*6 < 2542 (3);
542* < 5429 (8); 4*8 < 469 (0, 1, 2, 3, 4, 5, 6).
8.
20 = 1/5 ; 100 = 1/10 ; 10 = 1/10 ;
100 = 1/10 ; 500 = ½ .
9. (). 2 , 4 , 3 , 9 . .
|
|
|
5.
() 1, 2, 3, 7.
2. .
 |
1) 19 + 17 = 36 (.) ;
2) 72: 36 = 2 () ;
3) 2 ∙ 19 = 38 () ;
4) 2 17 = 34 () .
3. . .
14 730 + = 18 749, = 4019;
16 973 - = 9654, = 7319;
+ 6703 = 15 970, = 9267;
+ 6409 = 27 714, = 21 306.
7. .
.
2 6 .
. .
6. () 10, 11.(.2,3)
10. 3000: 100 = 30 (); 7 30 = 210 ().
 |
7.
8.
74
