Вычислите произведение д)25*7/30 е)32*11/48 ж)13/15*6 з)7/20*15

Найдем значение выражений: 

д) 25 * 7/30 = (25 * 7)/(5 * 6) = (5 * 5 * 7)/(5 * 6) = (1 * 5 * 7)/(1 * 6) = 5 * 7/6 = 35/6; 

е) 32 * 11/48 = (8 * 4 * 11)/(8 * 6) = (1 * 4 * 11)/(1 * 6) = 4 * 11/6 = 2 * 2 * 11/(2 * 3) = 1 * 2 * 11/(1 * 3) = 2 * 11/3 = 22/3; 

ж) 13/15 * 6 = 13 * 6/15 = (13 * 3 * 2)/(5 * 3) = (13 * 1 * 2)/(5 * 1) = 13 * 2/5 = 26/5 = 5.2; 

з) 7/20 * 15 = 7 * 15/20 = (7 * 5 * 3)/(5 * 4) = (7 * 1 * 3)/(1 * 4) = 7 * 3/4 = 21/4 = 5.25.