Question

Podem me ajudar por favor

a) 4/7+2/7-1/7=

b) 2/10+5/10+6/10-3/10=

c) 2/7+6/3=

d) 7/10+3/8=

e) 3/4.5/6=

f) 4/5.6/8=

g) 9/5:7/3=

h) 3/5:9/3=

Answer 1

Resposta:

Explicação passo a passo:

a) 4/7+2/7-1/7= 5/7

=4/7+2/7-1/7

= 6/7-1/7

= 5/7

_______________

b) 2/10+5/10+6/10-3/10=

= 7/10 + 3/10

= 10/10

= 1

____________

c) 2/7+6/3

= 2/7 + 2

= (2+7.2)/7

= (2+14)/7

= 16/7

_______________

d) 7/10+3/8=

Mmc(10,8)= 40

= (4.7+5.3)/40

= (28+15)/40

= 43/40

_____________

e) 3/4.5/6=

= 3/4.5/6

= 3/6 (:3)/(:3) . 5/4

= 1/2 . 5/4

= 5/8

____________

f) 4/5.6/8=

= 4/8 (:4)/(:4) . 6/5

= 1/2 . 6/5

= 6/2 . 1/5

= 3.1/5

= 3/5

____________

g) 9/5:7/3=

= 9/5 . 3/7

= 27/35

___________

h) 3/5:9/3=

= 3/5 : 3

= 3/5 . 1/3

= 3/3 . 1/5

= 1/5