Question

se dau numerele: a=11+26-13+13+17 b=82-37+25-43 Calculeaza a+b= a-b=

Answer 1

(11+26-13+13+17)+(82-37+25-43) =
= ( 37-13+13+17)+(45+25-43)
= ( 24 + 13 + 17 ) + ( 70 - 43 )
= ( 37 + 17 ) + 27
= 54 + 27
= 81
 
(11 + 26 - 13 + 13 + 17 ) - ( 82-37+25-43 ) =
= ( 37 - 13 + 13 + 17 ) - ( 45 + 25 - 43 )
= ( 24 + 13 + 17 ) - ( 70  - 43 )
= ( 37 + 17 ) - 27
= 54 - 27
= 27



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