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{[(10×10+10×10):10-10]+10×10-10} :10=

Răspuns :

{[(10x10+10x10) : 10 - 10] +10x10-10} : 10 =
= {[( 100+100) : 10 - 10] + 100 -10} : 10 =
=[ ( 200 : 10 -10 ) + 100 - 10] : 10 =
= [ ( 20 - 10 ) + 100 - 10] : 10 =
= ( 10 + 100 - 10 ) : 10 =
= ( 110 - 10 ) : 10 =
= 100 : 10 =
=10
{[(100+100):10-10]+100-10}:10=
{[200:10-10]+100-10}:10=
{[10+100-10}:10=
100:10=10