Question

resolva essa expressões numericas:
a) 2/3-5/4+27/12:9/2
B)-2/5+5/2-(9/2+1/4)
C)-1/2-(3/4.12/9+1
D)-1/2-(3/4.12/9+1)
E)(-2-3,4+1)+(4,5):(0,9)+2,3
F)2,5+(-0,7-4,5)-3,4.(-2)

Answer 1

A) 2/3-5/4+27/12:9/2=
8-15+27:54/12=
8-15+5/12=
-7+5/12=
-2/12=
*Simplifica por 2
Resp.: -1/6

B) -2/5+5/2-(9/2+1/4)=
-2/5+5/2-(18+1/4)=
-2/5+5/2-19/4=
-8+50-95/20=
-53/20

C) -1/2-(3/4•12/9+1)=
-1/2-(27•48+36/36)=
-1/2-1332/36=
-18-1332/36=
-1350/36=
-37,5

D) suponho que esta alternativa estaja igual à anterior.

E) (-2-3,4+1)+4,5÷0,9+2,3=
(-5,4+1)+4,5÷0,9+2,3=
-4,4+4,5÷0,9+2,3=
-4,4+0,5+2,3=
-3,9+2,5=
-1,4

F) 2,5+(-0,7-4,5)-3,4•(-2)=
2,5-5,2-3,4•(-2)=
2,5-5,2+6,8=
3,7+6,8=
10,5