Решите пожалуйста))))) 2, 3, 4, 5.

21)12/95:9/38=12/95*38/9=8/152)8/15*15/16=8/16=1/2

2. =(12/95 *38/9)*15/16 =(12*38)*15 /(95*9)*16 =(4*38*3) /(19*3*16) =2/4 =1/2 =0.53. =4 6/12 : 1 1/2 =4 1/2 : 3/2 =9/2 *2/3 =9*2 / 2*3 =34. =(3/4 *6/5)+(5/2 *2/3) -(1 :10/9) =(3*6)/(4*5) +(5*2)/(2*3) -(1 *9/10) =18/20 +5/3 - 9/10 =9/10 +5/3 -9/10 =5/3 =1 2/3(одна целая две третьих) 5. =57/8 : 19/4 *8 =57/8 *4/19 *8 =(57*4*8) /(8*19) =3*4 =12