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Ex. 13 dau coroana si ma abonez​

Ex 13 Dau Coroana Si Ma Abonez class=

Răspuns :

Răspuns:

12.

A*56/90=35/27

A=35/27:56/90

A=35/27*90/56

A=25/12

13.

21/220:A =5*5/42

21/220:A=215/42

A=21/220:215/42

A=21/220*42/215

A=441/4730

A este fractia