Question

1: Oblicz, pamiętając o skracaniu.
a) 9/20 x 5/18 =

b) 13/60 x 15/26 =

c) 3/5 x 1/8 x 10/3 =
d) 3/7 x 14/15 x 10/21 =

e) 5/12 x 9/40 x 8/15=

f) 15/27 x 12/25 x 5/24 =

g) 46/39 x 3/8 x 13 =


2. Uzupełnij brakujące liczby
a) ( ) x 1 1/2 = 1
b) 11/4 x ( ) x 4/11 = 1
c) 5 3/5 x ( ) = 1

d) 2/9 x ( ) x 4/11 = 1
e) 7 1/3 x ( ) x 3/2 = 7 1/3

f)1 2/5 x 5/7 ( ) = 7/5

Answer 1

 a) 9/20 x 5/18 = 1\4 x 1\2 = 1/8
 
b) 13/60 x 15/26 = 1\4 x 1\2 = 1\8

c) 3/5 x 1/8 x 10/3 = 1\1 x 1\8 x 2\1

 d) 3/7 x 14/15 x 10/21 =1\1 x 2\3 x 2\3 = 4/9

e) 5/12 x 9/40 x 8/15=1\12 x 9\5 x 1/3 = 9\180 = 1/20


f) 15/27 x 12/25 x 5/24 = 15\27 x 1\5 x 1\2

g) 46/39 x 3/8 x 13 =46/39 x 3/8 x 13/1 = 46/13 x 1/8 x 13/1 =598/104 = 299/52