а) 0.75 = 75/100 = 3/4
б) 0.625 = 625/1000 = 5/8
в) 9/15 : 5/8 = (9/15) (8/5) = 72/75 = 24/25 : 0.64 = 24/25 / 64/100 = 24/25 100/64 = 600/1600 = 3/8
г) 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : (65/10) (11/130) = 13/14 : 11/25 = 13/14 25/11 = 325/1540 = 65/308
а) 0.75 = 75/100 = 3/4
б) 0.625 = 625/1000 = 5/8
в) 9/15 : 5/8 = (9/15) (8/5) = 72/75 = 24/25 : 0.64 = 24/25 / 64/100 = 24/25 100/64 = 600/1600 = 3/8
г) 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : 6.5 11/130 = 13/14 : (65/10) (11/130) = 13/14 : 11/25 = 13/14 25/11 = 325/1540 = 65/308