Question

Oblicz:

(1,6+2,2):6i1/3

(3/8+5/6):4i5/6

(1-7/9)*(5,2-0,2)

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Answer 1

(1,6 + 2,2) : 6 i 1/3 = 
= 3,8 : 19/3 = 
= 38/10 : 19/3 = 
= 38/10 * 3/19 = 
= 6/10 =
= 3/5 
===========================
(3/8 + 5/6) : 4 i 5/6 = 
= (9/24 + 20/24) : 29/6 = 
= 29/24 * 6/29 =

= 1/4
===========================
(1 - 7/9) * (5,2 - 0,2) = 
= (9/9 - 7/9) * 5 = 
= 2/9 * 5 = 
= 10/9 = 
= 1 i 1/9