Question

Oblicz:

1/4-5/3+2=

7/6*4/3-7/8:7/4=

3/4=2/3:(-8/12)=

-2 1/2* (-1/2 - 2/3)=

Answer 1

1/4-5/3+2 = 3/12-20/12+2=-17/12+2=-17/12+24/12 = 7/12

7/6*4/3-7/8:7/4 = 17/3*2/3-7/8*4/7 = 34/9-4/8 = 272/72 - 36/72 = 236/72 = 3 20/72 = 3 5/18

3/4+2/3:(-8/12) = 3/4+2/3*(-12/8) = 3/4-4/4 = - 1/4

-2 1/2* (-1/2 - 2/3) = -5/2*(-3/6-4/6) = -5/2*(-7/6) = 35/12 = 2  11/12