Question

Calculati: doar d e f

dau coroana!!!!

Answer 1

Răspuns

Explicație pas cu pas:

d. 2 si 1/4x2/15+8/15=

   9/4x2/15+8/15=

   3/10+8/15=

    (9+16)/30=

     25/30=5/6

e.  17/9-4/27x3 si 15/16=

    17/9-4/27x63/16=

     17/9-7/12=

     (68-21)/36=

     47/36

f.  10/21x1 si 3/4-11/27=

    10/21x7/4-11/27=

    5/6-11/27=

    (45-22)/54=

    23/54