Question

2. Efectuati calcuele: a) -17 + (-3 -5) - (-1 +3 )- (+2 -6); b: [-4 - (-3 +5 )+ (-7 +9 )] - [-4 +3 -( -4 +7 )]. VA ROG REPEDE!!!

Answer 1

Răspuns:

a) -17 + ( -3 -5 ) - ( -1 + 3 ) - ( 2 - 6 ) = ?

-17 - 8 - 2 + 4 = -25 - 2 + 4 = -27 + 4 = -23

b) [ -4 - ( -3 + 5 ) + ( -7 + 9 ) ] - [ -4 + 3 - ( -4 + 7 ) ] =?

( -4 - 2 + 2 ) - ( -4 + 3 - 3 ) =

-4 + 4 = 0