a)\(\frac{8}{3}\)
b)\(\frac{1}{5}=0,2\)
c)\(\frac{17}{135}\)
d)\(\frac{2}{3}\)
e)\(\frac{5}{2}=2,5\)
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
k nha
a ) 8/3
b) 1/5
c) 17/135
d) 2/3
e) 5/2
