Question

Oblicz.
a)5/7 x 4/9 =
b) 1/5 x 2/3 =
c)2/5 x 7/8 =
d)3/10 x 7/8 =
e) 6/15 x 5/4 =

Zadanie drugie.:
Oblicz.
a) 5/12 x 4/7 =
b) 12/7 x 11/5 =
c)5/7 x 4/9 x 5 =
d) 5 x 3/13 x 4/6 =
e)3/10 x 15/4 x 1/2 =
f) 1/4 x 7/8 x 13/5 =

Answer 1

a)5/7 x 4/9 =20/63
b) 1/5 x 2/3 =2/15
c)2/5 x 7/8 =14/40
d)3/10 x 7/8 =21/80
e) 6/15 x 5/4 =30/60

Zadanie drugie.:
a) 5/12 x 4/7 =20/84
b) 12/7 x 11/5 =132/35
c)5/7 x 4/9 x 5 =100/315
d) 5 x 3/13 x 4/6 =60/390
e)3/10 x 15/4 x 1/2 =45/80
f) 1/4 x 7/8 x 13/5 =91/160

prosze o naj

Answer 2

Zad 1:

a)5/7 x 4/9 = 20/63
b) 1/5 x 2/3 = 2/15
c)2/5 x 7/8 = 14/40 = 7/20
d)3/10 x 7/8 = 21/80
e) 6/15 x 5/4 = 3/3 x 1/2 = 3/6 = 1/2

zad 2:
a) 5/12 x 4/7 = 20/84 = 10/41
b) 12/7 x 11/5 = 132/35 = 3 i 27/35
c)5/7 x 4/9 x 5 = 20/63 x 5/1 = 100/63 = 1 i 37/63
d) 5 x 3/13 x 4/6 =5/1 x 3/13 x 4/6 = 15/13 x 4/6 = 60/78 = 30/39 = 10/13
e)3/10 x 15/4 x 1/2 =  45/40 x 1/2 = 45/80 = 9/16
f) 1/4 x 7/8 x 13/5 = 7/32 x 13/5 = 91/160