1- determine os produtos simplificando os resultados, quando possivel.
a) 3 • 2/7
b) 6/7 • 8
c) 5 • 3 1/5
d) 3/4 • 7/9
e) 1/3 • 27/15
f) 2/3 • 10/4 • 9/15
g) 5/4 • 8/15 • 1/2
h) 7/9 • 3/2 • 0
i) 2 1/5 • 35/33
j) 1 3/7 • 63/40
2- Determine
a) o triplo de 7/15;
b) o dobro de 5/8;
Soluções para a tarefa
Resposta:
Explicação passo-a-passo:
. 1)
. a) 3 . 2/7 = 6/7
. b) 6/7 . 8 = 48/7
. c) 5 . 3 1/5 = 5 . 16/5 = 16
. d) 3/4 . 7/9 = 1/4 . 7/3 = 7/12
. e) 1/3 . 27/15 = 1/1 . 9/15 = 9/15 = 3/5
. f) 2/3 . 10/4 . 9/15 = 2 . 10 . 9 / 3 . 4 . 15
. = 1 . 2 . 3 / 1 . 2 . 3 = 1
. g) 5/4 . 8/15 . 1/2 = 5 . 8 . 1 / 4 . 15 . 2
. = 1 . 2 . 1 / 1 . 3 . 2 = 1/3
. h) 7/9 . 3/2 . 0 = 0
. i) 2 1/5 . 55/33 = 11/5 . 5/3 = 11/3
.
. 2)
. a) o triplo de 7/15 = 3 . 7/15 = 7/5
. b) o dobro de 5/8 = 2 . 5/8 = 5/4
.
(Espero ter colaborado)
Explicação passo-a-passo:
Multiplicação de fracções:
A)
3 • 2/7
= 6/7
B)
6/7 • 8
=48/7
C)
5 • 3 1/3
5 • 10/3
50/3
D)
3/4 • 7/9
= 21/36
= 7/12
E)
1/3 • 27/15
= 27/45
= 9/15
= 3/5
f)
2/3 • 10/4 • 9/15
= 180/180
= 1
g)
5/4 • 8/15 • 1/2
= 40/120
= 1/3
h)
7/9 • 3/2 • 0
= 0
i)
2 1/5 • 35/33
= 11/5 • 35/33
= 385/165
= 77/33
J)
1 3/7 • 63/40
=10/7 • 63/40
= 630/280
= 63/28
2.A)
7/15 • 3
= 21/15
= 7/5
B)
5/8 • 2
= 10/8
= 5/4
Espero ter ajudado bastante!)