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Ria1111111
a fost răspuns

12/13×[1/3+1÷(1/7+6/7×1/6)÷7/6]
Va rog!! Dau coroana!!

Răspuns :

Renatemambouko
12/13×[1/3+1÷(1/7+6/7×1/6)÷7/6] =
=12/13×[1/3+1÷(1/7+7)×6/7] =
=12/13×(1/3+1÷8/7×6/7) =
=12/13×(1/3+1×7/8×6/7) =
=12/13×(1/3+6/8) =
=12/13×(1/3+3/4) =
=12/13×(4+9)/12 =
=12/13×13/12 =1

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