Question

(13/12:7/15):39/70 VA ROG MULTE PUNCTE 30 !!!!

Answer 1

Răspuns

25 / 6

Explicație pas cu pas:

( 13 / 12 : 7 / 15 ) : 39 / 70 =

= ( 13 / 12 x 15 / 7 ) : 39 / 70

= ( 13 / 4 x 5 / 7 ) : 39 / 70

= 65 / 28 : 39 / 70

= 65 / 28 x 70 / 39

= 5 / 2 x 5 / 3

= 25 / 6

Answer 2

$( \frac{13}{12} \div \frac{7}{15} ) \div \frac{39}{70} \\ = ( \frac{13}{12} \times \frac{15}{7} ) \times \frac{70}{39} = \\ = \frac{195}{84} \times \frac{70}{39} = \\ = \frac{13650}{3276} (simplificam \: fr \: cu \: 546) \\ = \frac{25}{6}$