Question

Найдите значение выражения -9/25 + 0,21 *8/3

Answer 1

1) 0,21 * ( 8/3 ) = ( 21/100 ) * ( 8/3 ) = 168/300 = 42/75 ; 2) - ( 9/25 ) + ( 42/75 ) = - ( 27/75 ) + ( 42/75 ) = 15/75 = 1/5 = 0,2