Question

Oblicz.
a) 3x 7/8 (7/8 to ułamek)
b) 8/7x 3
c) 2x 1 1/7 ( te / to ułamek jak coś ! )
d) 2 1/5 x3
e) 5x10 1/2
f) 10 x 8 2/3
g) 5x 7/10
h) 2/7 x 14
i) 2/18 x12
j) 4 x 5 5/12
k) 6 2/8 x 6
l) 3x 5 5/6

Pilnee prosze o pomoc !! Bede wdzieczna ;)

jakby co to np. 7/5 lub cos takiego to ułamek a .. 4 6/7 to 4 cale i 6/7 czyli ułamek ;)

Answer 1

A) 3 *  7/8 = 21/8 = 2 i 5/8

b)
8/7 *  3 = 24/7 = 3 i 3/7

c)
2 * 1 i 1/7 =

= 2 * 8/7 =

= 16/7=

= 2 i 2/7


d)
2 i 1/5  * 3=

= 11/5 * 3=

= 33/5=

= 6 i 3/5


e)
5 * 10 i 1/2=

= 5 * 21/2=

=105/2=

= 52 i 1/2


f)
10  *  8 i 2/3 =

= 10 * 26/3 =

= 260/3=

= 86 i 2/3


g)
5 *  7/10 = (skracam 5 z 10)

= 1 * 7/2=

= 7/2=

= 3 i 1/2



h)
2/7  * 14=  (skracam 7 z 14)

= 2/1 * 2=

= 4/1=

= 4



i)
2/18  * 12 = (skracam 18 z 12)

= 2/3 * 2=

= 4/3=

= 1 i 1/3




j)
4  *  5 i 5/12 =

= 4 * 65/12 = (skracam 4 z 12)

= 1 * 65/3=

= 65/3=

= 21 i 2/3



k)
6 i 2/8  *  6=

= 50/8 * 6 =  ( skracam 8 z 6)

= 50/4 * 3=

= 150/4 =

= 37 i 2/4=

= 37 i 1/2




l)
3 *  5 i 5/6 =

= 3 * 35/6= (skracam 3 z 6)

= 1 * 35/2=

= 35/2 =

= 17 i 1/2