Найдите значения выражений : а ) 1/2 * 1/2 *3/4 ; б ) 3/8*2/3*4/5 ; в) 1/4*2/5*10/11 ; г) 3/8 * 2/3 *4/5 SOS!!!!!!!!!!!!!!!!

а ) 1 / 2 * 1 / 2 *3 / 4 = (1 * 1) / (2 * 2) * 3 / 4 = 1 / 4 * 3 / 4 = (1 * 3) / (4 * 4) = 3 / 16; б ) 3 / 8 * 2 / 3 * 4 / 5 = (3 * 2) / (8 * 3) * 4 / 5 = (1 * 2) / (8 * 1) * 4 / 5 = 2 / 8 * 4 / 5 = 2 / (4 * 2) * 4 / 5 =1 / (4 * 1 ) * 4 / 5 = 1 / 4 * 4 / 5 = (1 * 4) / ( 4 * 5) = (1 * 1) / (1 * 5) = 1 / 5; в ) 1 / 4 * 2 / 5 * 10 / 11 = (1 * 2) / (4 * 5) * 10 / 11 = (1 * 2) / (2 * 2 * 5) * 10 / 11 = (1 * 1) / ( 1 * 2 * 5) * 10 / 11 = 1 / (2 * 5) * 10 / 11 = 1 / 10 * 10 / 11 = ( 1 * 10) / (10 * 11) = (1 * 1) / (1 * 11) = 1 / 11; г ) 3 / 8 * 2 / 3 * 4 / 5 = (3 * 2) / (8 * 3) * 4 / 5 = (1 * 2) / (8 * 1) * 4 / 5 = 1 / 4 * 4 / 5 = 1 / 5.