: 1) ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 4, 8, 7, 5*.
4. : , , ; , , .
83 200: 8 > 80 032: 8
62 400: 6 > 60 240: 6
85 000: 2 > 85 000: 5
5*. , , .
10 10 10
10 1 10:10 = 1() = 1000
1 1 1000: 10 = 100 ()
25 1 100 25 = 2500 ()
25? 25 = 25 000
1) 25 000 : 2500= 10 () . (25), 10 .
2) 1 10 = 10().
5.
() 2, 1, 3, 6.
1. . .
3. ( ) , 1 15 .
 |
15 . , .
1) 20-15 = 5 (/) ( );
2) 15: 5 = 3 () , .
) 9, 10.
9.
1) 27 3 = 81 (.); 3) 7 - 3 = 4 ();
2) 241 - 81 = 160 (.); 4) 160: 4 = 40 (.).
10. 156 029; 455 287.
7.
8.
87
. .
: 1 ) , ;
2) .
3) ;
4) ;
5)
1.
2.
3.
4.
() 7, 3, 5*.
3. 00 k = 600, , k = 6. , 6:
1) = 1, = 6; 100 6 = 600;
2) = 2, = 3; 200 3 = 600;
3) = 3, k = 2; 300 2 = 600;
4) = 6, = 1; 600 1 = 600.
5*. , 10 5 .
10 : 5 = 2 (.) ( );
|
|
|
2 6 = 12 (.) 2 +10 = 12 (.) .
: 2 , 12 .
7. *** < **** ;
45*** < 48*** 5 < 8; **24* > 578; **7* < *1*2*
5.
() 6, 2, 1, 4.
1. .
12 179 4559 1843
9247 33 396 23 423
2.
 |
1) 900: 3 = 300 () ;
2) 900 - 300 = 600 () 300 2 = 600 () ;
3) 600: 10 = 60 () .
4.
1) 56: 7 = 8 () ABCD;
2) 8 6 = 48 (2) .
6. 207 986. .
) 8, 9.
8.
4 570 .
9. 17 269 9644 67 271
19 411 7673 82 644
7.
8.
88
