Question

Oblicz.

a) 5/12*4/7

b) 12/7*11/5

c) 5/7*4/9*5

d) 5*3/13*4/6

e) 3/1015/4*1/2

f) 1/4*7/8*13/15

Answer 1

a) 5/21

b)3 i 1/7

c)1 i 37/63

d)10/13

e)9/16

f)91/480

Answer 2

a) 5/12*4/7 = 20/84 = 5/21

 

b) 12/7*11/5 = 132/35 = 3  27/35 

 

c) 5/7*4/9*5 = 20/63  * 5 = 100/63 = 1   37/63

 

d) 5*3/13*4/6 = 5 * 12/78 = 60/78 = 10/13

 

e) 3/1015/4*1/2= 1/3 * 1015/4 *1/2 = 1015/24 = 42  7/24

 

f) 1/4*7/8*13/15 = 91/480