Выполнить умножение дробей 4*11/2; 11/3*9; 3/7*21/3; 7/8*51/3; 21/3*2.
4 • 11/2 = 2 * 11 = 22 11/3 • 9 = 11 • 3 = 33 3/7 • 21/3 = 21/7 = 3 7/8 • 51/3 = ( 17 • 7 ) / 8 = 119/8 = 14 ( 7/8 ) 21/3 • 2 = 42/3 = 14