Question

найдите значение выражения 9/20•3/4-1 3/5•1/4

Answer 1

9/20 * 3/4  - 1 3/5 * 1/4
= 9/20 * 3/4 - 8/5 * 1/4
= 27/80 - 8/20 
= 27/80 - 32/20
= -5/80 = -1/16