- , .
- . , .
- .= 2,53,5;
- .= . + 11,5
( = 2,5 ). () , ( ), . .
. , , 1112. . . .
3 . - 31. 31 315= ( + (1,0 ÷ 1,5)), 4.5 .
5 15, , 3 1112. 7. 3 7. . 37. 2.
3 3 , 3. () , (). 33 = - . 1.6 . 0.4 ÷ 0,5 .
33 , , . .
4 6 . 4 4.0 ÷ 5.0 . .
3 , 3. 4.0÷5.0
. . (0,5 ÷ 2,5 ), (3,0 ÷ 5,0 ) (5,0 ÷ 8,0 ). .