Question

Considera os numeros racionais. Se:x=2,5 y= -3,21 e z= 0,625. Efetue as operações quando:

Answer 1

Resposta:

a) x+y-z

2,5+(-3,21)-(+0,625)=

8,025-0,625=

-8,65

b) x.y+z

2,5.(-3,21)+0,625=

-8,025+0,625=

-7,4

c) y-x.z

-3,21-(2,5).0,625=

-3,21-2,5.0,625=

-3,21-1,5625=

-4,7725

d) z+(-y).x

0,625+(-(-3,21).2,5=

0,625+3,21.2,5=

0,625+8,025=

8,65

e) (x-y).z

(2,5-(-3,21).0,625=

(2,5+3,21).0,625=

5,71.0,625=

3,56875

f) y-x-z

-3,21-2,5-0,625=

-6,335

g) x+y+z

2,5+(-3,21)+0,625=

2,5-3,21+0,625=

-0,085

h) x-(-y)-(+z)

2,5-(-(-3,21)-(+0,625)=

2,5-3,21-0,625=

-1,335