Question

Calculați : a) (3\7: 6\14): 3\4= b) (3\25: 4\5) : 9\4= c) ( 17\8: 17\35) : 7\16= d) (17\3:21\4) : 34\7= e). ( 36\13:4) : ( 5\26 : 7\36) = f). ( 3 întregi si 1\2 : 2 întregi si 1\2):( 6: 12\19 ) = g) 2160\1410: 7200\940 =

Answer 1

a) (3/7: 6/14): 3/4=
=(3/7x 14/6) x 4/3=
=1x4/3= 4/3

 b) (3/25: 4/5) : 9/4=
= (3/25 x 5/4) x 4/9=
= 3/20 x 4/9=1/15
 
c) ( 17/8: 17/35) : 7/16=
=( 17/8x 35/17) x 16/7=
=35/8 x 16/7=10

 d) (17/3:21/4) : 34/7=
= (17/3x4/21) x 7/34=
= (17x4)/(3x21) x 7/34=2/9

 e) ( 36/13:4) : ( 5/26 : 7/36) =
=9/13 x(7x13)/(5x18) =
=9/13 x(7x13)/(5x18) =7/10

 f). ( 3 1/2 : 2  1/2):( 6: 12/19 ) =
= ( 7/2 x 2/5) :( 6x 19/12 ) =
=  7/5 : 19/2  =
=  7/5 : 2/19  =
=14/95

g) 2160/1410: 7200/940 =
= 216/141 x 94/720 =
= 72/47 x 47/360 =
= 72/360=
=1/5