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calculeaza:(13/5-3/5)-(4/6+7/6-5/6)+18/9 ;(1+4/2+9/3)-8/8

Răspuns :

( 13 / 5 - 3 / 5 ) - ( 4 / 6 + 7 / 6 - 5 / 6 ) + 18 / 9 = 3

=  10 / 5 - ( 11 / 6 - 5 / 6 ) + 2 = 

= 2 - 6 / 6 + 2 =

= 2 - 1 + 2 

= 1 + 2 

= 3

(1 + 4 / 2 + 9 / 3 ) - 8 / 8= 5

= ( 1 + 2 + 3 ) - 1 = 

= 6 - 1 = 

= 5