Question

Efectuați: 6,5 · (1,2 - 4,(3) ) - 9,9 : 3 + 7,4 ·5 - 450

Answer 1

6,5*[1,2-4,(3)]-9,9:3+7,4*5-450=
= 65/10*[12/10-(43-4)/9]-3,3+37-450=
= 13/2*(6/5-39/9)-416,3=
= 13/2* (54-195)/45-4163/10=
= 13/2* (-141)/45-4163/10=
= -1833/90-4163/10=
=( -1833-37467)/90
=-39300/90=
=-3930/9=
=-1310/3=
=436,(6)