Question

Ułamki /
a) 3 7/12 - 1 3/5 - 1 11/20 + 1 5/6
b) 8 5/36 - 3 7/9 - 2 1/8 - 1 7/18
c)( 1 3/4 - 11/20 ) razy ( 2 1/2 - 1 7/18
d) ( 3 1/2 - 1 1/6 ) razy ( 1 3/7 - 11/14 )

proszę o pomoc ;)

Answer 1

A) 3 7/12 - 1 3/5 - 1 11/20 + 1 5/6 =  43/12 - 8/5 - 31/20 + 11/6 = 215/60 - 96/60 - 93/60 + 110/60 = 136/60 = 2 i 16/60 = 2 i 8/30 = 2 i 4/15

b) 8 5/36 - 3 7/9 - 2 1/8 - 1 7/18 = 293/36 - 34/8 - 17/8 - 25/18 = 586/72 - 306/72 - 153/72 - 100/72 = 586/72 - 559/73 = - 27/72 = -3/8

c)( 1 3/4 - 11/20 ) razy ( 2 1/2 - 1 7/18) =  (7/4 - 11/20) * (5/2 - 25/18) = (35/20 - 11/20) * (45/18 - 25/18) =24/20 * 20/18 = 24/18 = 1 i 6/18 = 1 i 1/3
 
d) ( 3 1/2 - 1 1/6 ) razy ( 1 3/7 - 11/14 ) = (7/2 - 7/6) * ( 10/7 - 11/14) = (21/6 - 7/6) * (20/14 -11/14)  = 14/6 * 9/14 = 3/2 = 1 i 1/2