Question

36/24 + 25/20 + 19/4
21/13 + 42/26 + 15/39
enunt: calculati numitotul comun​

Answer 1

Răspuns:

36/24 + 25/20 + 19/4

simplificam fractiile

36/24 + 25/20 +19/4 =

= 3/2 + 5/4 + 19/4 =

= 6/4 + 5/4 + 19/4

= (6+5+19)/4 =

= 30/4 = 7,5

2) 21/13 + 42/26 + 15/39

observam ca doar fractia din mijloc merge simplificata si ne uitam la numitor

13, 26, 39 (toti multiplii de 13, deci amplificam fractiile)

=> 21/13 + 42/26 + 15/39 =

= 21/13 + 21/13 + 15/39

= 63/39 + 63/13 + 15/39=

= (63+63+15)/39=

=141/39

Sper sa fie in regula si clar!