: 1) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 1, 9, 5*.
1. , .
5*. .
I , 5. : 2, 4, 6, 8, 12, 14, 16, 18. II , 5. : 0, 10,20. III , 5, . : 5, 15. , 5: 1, 3, 7, 9, 11, 13, 17, 19.
 |
5.
() 8, 3, 4, 2, 7.
2. . .
3. : 12 , 5 , 10 . . ?
1) 5 12 = 60 () ( );
2) 60 : 10 - 6 () .
4. 18 23 - 5 52 = 12 31 .
.
: 5 52 . 12 31 . , .
7. 80 420; 10 180; 94; 435.
8. 2002; 20 400; 67 000; 8 000 008.
) 10, 11.
10. .
1) 805 5 + 805 4 = 7245 ();
2) 805 (5 + 4) = 805 9 = 7245 ().
7.
8.
75
. .
: 1) ;
2)
3) ;
4) ;
5)
1.
2.
3.
4.
() 8, 5*.
5 *. .
 |
1) 600: 2 = 300 () ;
2) 300: 3 = 100 () ;
3) 100 2 = 200 () .
8. .
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3582 18862 446779
5.
() 1, 2, 3, 4, 6, 7.
|
|
|
1. . ,
13 000 6 = 13 . ∙ 6 = 78 . = 78 000.
2.
2)17 - 8 = 9 (.);
3) 3056 ∙ 9 = 27 504 ();
4)22 984 + 27 504 = 50 488 ().
3.
.
6.
2700 4 + 4 = 10 800 + 4 = 10 804
2700 7 + 7=18 900 + 7 = 18 907
2700 1 + 1 = 2700 + 1 = 2701
2700 0 + 0 = 0
) 9, 10.
9.
I. (52 + 74) 8 = 1008 ().
. 52 8 + 74 8 = 416 + 592 = 1008 ().
7.
8.
76
