а) 56/7 : 120/7 = 8:17
б) (615 + 14) / 15 : (315 + 7)/15 = 104 / 15 : 52/15 = 104:52 = 2:1
в) 7,25 / 21,75 = 725 / 2175 = 1:3
г) 18,63 / 6,21 = 1863 / 621 = 3:1
д) (1*8 + 5)/8 : 1,3 : 0,39 = 13/8 : 13/10 : 39/100 = 1300/1040:1040/800:39/100 = 65/52:130/104= 5:2
е) 1/1.5 : 0.11 : 1 5/6 = 0.66/1.1 : 0.11 : 11/6 = 0.6 : 0.11 : 1.83 = 6:11:183
а) 56/7 : 120/7 = 8:17
б) (615 + 14) / 15 : (315 + 7)/15 = 104 / 15 : 52/15 = 104:52 = 2:1
в) 7,25 / 21,75 = 725 / 2175 = 1:3
г) 18,63 / 6,21 = 1863 / 621 = 3:1
д) (1*8 + 5)/8 : 1,3 : 0,39 = 13/8 : 13/10 : 39/100 = 1300/1040:1040/800:39/100 = 65/52:130/104= 5:2
е) 1/1.5 : 0.11 : 1 5/6 = 0.66/1.1 : 0.11 : 11/6 = 0.6 : 0.11 : 1.83 = 6:11:183