: 1) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 8, 7, 5*.
5*.
1) 20: 5 = 4 (.)
2) 4 2 = 8 (.)
: 4 , 8 .
7. , , . , ):
60: 1 > 4 () 60: 20 > 4 ()
60: 5 > 4 () 60: 30 > 4 ()
8. ) 18 , 8 ; 10 . ( ) 2 ,
(10 - 8 = 2).
) 11, 6, 5; 6 - 5 = 1.
5.
() 4, 3, 6, 1, 2, 9.
1. , , , , 2043. 1 10 : 8 . 
10 . 5 . 10 . , 13, 3 ( ), 10, 1 ( ).
: , , , . , .
5028 1654.
1. : 8 . - 4 . = 4 . .
2. : 2 . - 5 . . . .
10 . 10 : 10 . + 2 . = 12 .
: 12 . - 5 . = 7 . .
3. . 9 : 9 .- 6 . = 3 . .
4. . 4 : 4 . - 1 . = 3 . .
5. : 3374.
2. . 
3.
2000 + 24 500 + 2300 + 1700 = 30 500 (2) = 3 500 2
4. .
27 495 + 9 780 = 27 495 + 9780 = 37 275 = 37 275
|
|
|
19 450 + 7 080 = 26 530
28 75 + 143 87 = 2875 + 14 387 = 17 262 = 172 62
5 25 + 9 87 = 525 + 987 = 1512 = 15 12 = 1 512
6. :
3789 5723 4468
+ 2857+6282+3751
6646 12005 8219
9. .
+ 23 856 = 497 943
= 497 943 - 23 856
= 474 087
474 087 + 23 856 = 497 943
497 943 = 497 943 -
 |
135 487 + = 567834; = 432 347.
) 10, 11.
10.
 |
I. 84: 12 =7 (); 7 ∙ 9 = 63 ();
84 + 63 = 147 ().
II. 84: 12 = 7 (); 12 + 9 = 21 ();
7 21 = 147 ().
11.
4812; 6735; 6175; 75 179.
7. 8.
56
