Question

Calcule:

A)2/9+(-3/10)=
B)(-12,5)+(-4,16)=
C)-4/5+1/2=
D)(-2/9)-(-1/4)
E)1,86-(-0,35)
F)(-1/8)-(-0,75)
G)(-1,4)-(-5)

Answer 1

Resposta:

Explicação passo-a-passo:

A)

= 2/9+(-3/10)

= 2/9 - 3/10

= (10.2 - 9.3)/90

= (20-27)/90

= -7/90

B)(-12,5)+(-4,16)

= -12,50 - 4,16

= -16,66

C)-4/5+1/2

= - 4,5 + 0,5

= - 4

D)(-2/9)-(-1/4)

= -2/9 + 1/4

=[ 4.(-2) + 9.1]/36

= (-8+9)/36

= 1/36

E)1,86-(-0,35)

= 1,86 + 0,35

= 2,21

F)(-1/8)-(-0,75)

= - 1/8 + 0,75

= -1/8 + 75/100 (:25)/(:25)

= - 1/8 + 3/4

= (-1 + 2.3)/8

= (-1+6)/8

= 5/8

G)(-1,4)-(-5)

= - 1,4 + 5,0

= 5,0 - 1,4

= 3,6