Сократите: 12*21/35*15; 72*11/33*30; 25*17*44/51*8*75; 8*3+8*23/3*16

Question

Сократите: 12*21/35*15; 72*11/33*30; 25*17*44/51*8*75; 8*3+8*23/3*16

Answer 1

12*21/35*15=(12/15)*(21/35)=(4/5)*(3/5)=12/25=0,48
72*11/33*30=(11/33)*(72/30)=(1/3)*(24/10)=8/10=0,8
 25*17*44/51*8*75=(25/75)*(17/51)*(44/8)=(1/3)*(1/3)*(11/2)=11/18
8*3+8*23/3*16=24+23/3*2=24+23/6=24+3 5/6=27 5/6