Question

16. a)[5/2-24/25×(21/16-3/8)]:6/5
b)27/19[3/2-5/6×(3/5-15)]

acel slash(/) este semnul de fracție
ex: 5/1 sau 5 supra 1


DAU COROANĂ​

Answer 1

Răspuns:

scriu direct rezolvarile

a)[5/2-24/25×(25/16-6/16)]:6/5=

(5/2-24/25×19/16):6/5=(5/2-57/50)×5/6=(125/50-57/50)×5/6

68/50×5/6=17/15

b)27/10×[3/2-5/6×(9/15-1/15)]=27/10×(3/2-5/6×8/15)=27/10×(3/2-4/9)=27/10×(27/18-8/18)=27/10×19/18=>57/20