Question

Oblicz i rozpisz;
1] 7 1/2 + 1/3=
2]7 1/2 : [2 1/3 + 3 1/4]=
3] 7 1/2 : 3/4=

Answer 1

1] 7 1/2 + 1/3= 7 3/6 + 2/6 = 7 5/6
2] 7 1/2 : [2 1/3 + 3 1/4] = 7 1/2 : [2 4/12 + 3 3/12] = 7 1/2 : 5 7/12 = 7 1/2 : 42/12= 8/2 x 12/42 = 4/1 x 6/21 = 24/21 = 1 3/21
3] 7 1/2 : 3/4= 8/2 x 4/3 = 8/1 x 2/3 = 16/3 = 5 1/3

Answer 2

71/2+1/3=15/2+1/3=45/6+2/6=47/6=7 5/6   2)15/2:(7/3+13/4)=15/2:(28/12+39/12)=15/22:67/12=15/22*12/67=90/67=1 23/67                                           3) 15/2:3/4=15/2*4/3=5/2*4/1=20/2=10