Răspuns:
Explicație pas cu pas:
a) 4 / 5 x 15 / 8 = ( 4 / 8 ) x ( 15 / 5 ) = 3 / 2
b) 7 / 10 x 20 / 21 = ( 7 / 21 ) x ( 20 / 10 ) = 2 / 3
c ) 32 / 48 x 16 / 32 x 16 / 32 = ( 32 / 32 ) x ( 16 / 48 )x ( 16 / 32 ) =
32 / 48 x 16 / 32 x 16 / 32 = 1 / 3 x 16 / 32 = 1 / 3 x 1 / 2 = 1 / 6
d) 11 / 12 x 24 / 33 = ( 11 / 33 ) x ( 24 / 12 ) = 2 / 3
e) (33 / 44) x (77 / 88) x ( 55 / 22 ) = ( 3 / 4 ) x ( 7 / 8 ) x ( 5 / 2 ) =( 3 x 7 x 5 ) / ( 4 x 8 x 2 ) =105 / 64
f) ( 1 313 / 3131 ) x (31 / 13 ) = 101 / 101 = 1