Question

me ajudem, por favor!
resolva a subtrações abaixo:

a) 3/4 -1/4=
b) 5/7 - 3/7=
c)4/6-7/6=
d)3/4 - 1/2=
e)3/5 - 1/5=
f) 3/5 - 1/4=
g)4/6- 1/7=
h)2/3-1/2=
​

Answer 1

Resposta:

Explicação passo a passo:

resolva a subtrações abaixo:

a) 3/4 - 1/4

= 2/4 (:2)/(:2)

= 1/2

___________

b) 5/7 - 3/7

= 2/7

_________

c)4/6 - 7/6

= - 3/6 (:3)/(:3)

= - 1/2

________

d)3/4 - 1/2

Mmc (2,4)= 4

= (1.3 - 2.1)/4

= (3-2)/4

= 1/4

___________

e)3/5 - 1/5

= 2/5

____________

f) 3/5 - 1/4

Mmc(5,4)= 20

= (4.3 - 5.1)/20

= (12-5)/20

= 7/20

____________

g)4/6 (:2)/(:2) - 1/7

= 2/3 - 1/7

Mmc (3,7)= 21

= (7.2 - 3.1)/21

= (14 - 3)/21

= 11/21

_________

h) 2/3-1/2

Mmc (3,2)= 6

= (2.2 - 3.1)/6

= (4-3)/6

= 1/6

​_________