Question

2.Efectuati urmatoarele exercitii in doua moduri:
1)Desfiintand parantezele (si facand suma termenilor)
2)Calculand separat fiecare paranteza
i)-(38+20)+(-18+60)-(55-25+180)+(84-44)-(36+16)

Answer 1

- ( 38 + 20 ) + ( - 18 + 60 ) - ( 55 - 25 + 180 ) + ( 84 - 44 ) - ( 36 + 16 ) =
( 38 + 20 ) = 58
( - 18 + 60 ) = 42
( 55 - 25 + 180 ) = ( 30 + 180 ) = 210
( 84 - 44 ) = 40
( 36 + 16 = 52

= - 58 + 42 - 210 + 40 - 52
= - 16 - 210 + 40 - 52
= - 226 + 40 - 52
= - 186 - 52
= - 238