Question

(1,8*0,4-2 8/15:(-0,8) вычислите.

Answer 1

1) 1,8 • 0,4 = 0,72
2) 2 8/15 : ( - 0,8 ) = ( 38/15 ) : - ( 4/5 ) = - 38/12 = - 19/6 = - 3 1/6
3) 0,72 - ( - 3 1/6 ) = ( 72/100 ) + ( 19/6 ) = 18/25 + 19/6 = 216/300 + 950/300 = 1166/300 = 583/150 = 4 133/150
Ответ 4 133/150