Question

a) 21/11 x 22/17 x 68/63

b) 5/14 x 7/13 x 26/25

c) 7/9 x 3/35 x 17/9

d) 11/17 : 33/34

e) 15,7 : 6,28

 

Answer 1

a,8/3

b,1/5

c,17/135

d,2/3

e,5/2

Answer 2

a)\(\frac{8}{3}\)

b)\(\frac{1}{5}=0,2\)

c)\(\frac{17}{135}\)

d)\(\frac{2}{3}\)

e)\(\frac{5}{2}=2,5\)

Answer 3

a) 21/11 x 22/17 x 68/63

= (21 x 22 x 68)/ (11 x 17 x 63)

= 8/3

b) 5/14 x 7/13 x 26/25

= (5 x 7 x 26)/(14 x 13 x 25)

= (5 x 7 x 13 x 2) / ( 7 x 2 x 13 x 5 x 5)

= 1/5

c) 7/9 x 3/35 x 17/9

= (7 x 3 x 17)/ (9 x 35 x 9 )

= 17/135

d) 11/17 : 33/34

= 11/17 x 34/33

= (11 x 34)/(17 x 33)

= (11 x 17 x 2) / ( 17 x 33 x 11)

=2/33

e) 15,7 : 6,28

= 157/10 : 157/ 25

= 157/10 x 25/157

= (157 x 25) / ( 10 x 157)

= 25/10 = 5/2

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Answer 4

a ) 8/3

b) 1/5

c) 17/135

d) 2/3

e) 5/2