Question

Dau coroana si 50 de puncte.Ajutor!

Answer 1

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Answer 2

17
{ 8/35 + [ ( 3/2 - 33/35 ) + ( 3/14 - 2/35 ) - ( 2 - 12/7 + 5/14 ) ] } × 10/3=1
= { 8/35 + [ ( 105 /70 - 66/70 ) + (  15/70 - 4/70 ) - ( 28/14 - 24/14 + 5/14 } ]} × 10/3=
= [ 8/35 + ( 39/70 + 11/70 - 9/14 ) ] × 10/3 = 
= [ 8/35 + ( 50/70 -  45/70 ) ] × 10/3 =
= ( 8/35 + 5/70) × 10/3 =
= ( 16/70 + 5/70 ) × 10/3 =
= 21/70 × 10/3 =  → simplific pe 21 cu 3 =7/1, dar si pe 10 cu 70 =1/7
                             → simplific apoi pe 7 cu 7 = 1
=  1