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dau corona si 5 stele​

Dau Corona Si 5 Stele class=

Răspuns :

2 2/3= (2*3+2)/3= 8/3

2 1/7= (2*7+1)/7=15/7

[9-(8/3)*)15/7)]*(21/46)=

(9-40/7)*(21/46)=

[(63-40)7]*(21/46)=

(23/7)*(21/46)= 3/2

Răspuns:

Explicație pas cu pas:

(9-8/3·15/7)·21/46=(9-40/7)·21/46=(9·7-40)/7·21/2·23=(63-40)×3/2·23=

=23·3/2·23=3/2