: – 1 3/4 ( ), 1 , 1/2 , 1 (125) , 3/4 , ( 0,5 ), 1 , 1 , 1/3 , 1/4 ; – 2/3 , 2 .

1 . , 2-3 . 1 . . . . , – . .
3-4 , 5-6 .
180 15 .
, .
. 2-3 . 2-3 .

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