Question

Resolva as multiplicações de frações : a) ( 2/3 )x(-4/5) b) (-2/3)x(-4/5) c) (3/4)x(6/5) d) (8/9)x(7/8) *
2 pontos
a) -8/15 b) +8/15 c) -15/8 d) +15/8
a)-8/15 b) +8/15 c) +9/10 d) +7/9
a)+9/10 b) -9/10 c) -10/9 d) +10/9
a) -7/9 b) +7/9 c) +9/7 d) -9/7

Answer 1

Resposta:

2)

a)-8/15 b) +8/15 c) +9/10 d) +7/9

Explicação passo-a-passo:

a) ( 2/3 )x(-4/5)

= - 2/3 . 4/5

= - 8/15

-----------------------

b) (-2/3)x(-4/5)

= 2/3 . 4/5

= 8/15

------------------

c) (3/4)x(6/5)

= 3/4 . 6/5

= 18/20 (:2)/(:2)

= 9/10

d) (8/9)x(7/8)

= 8/9 . 7/8

= 8/8 . 7/9

= 7/9

---------------

R.:

2)

-8/15; 8/15; 9/20 ; 7/9