а) - 3/5 * 10/21 = - 30/105 = - 6/21
б) (-7)/36 * 6/(-21) = - 7/126 = - 1/18
в) 7 * ( - 3/14) = 7/1 * (- 3/14) = - 21/14 = -3/2 = - 1 1/2
г) - 1 1/3 * 9/16 = - 4/3 * 9/16 = - 12/16 = - 3/4
а) - 3/5 * 10/21 = - 30/105 = - 6/21
б) (-7)/36 * 6/(-21) = - 7/126 = - 1/18
в) 7 * ( - 3/14) = 7/1 * (- 3/14) = - 21/14 = -3/2 = - 1 1/2
г) - 1 1/3 * 9/16 = - 4/3 * 9/16 = - 12/16 = - 3/4