Question

Rút gọn:

a.\(\frac{2.7.13}{26.35}\)

b.\(\frac{3.5.11.13}{33.35.37}\)

c.\(\frac{23.5-23}{4-27}\)

d.\(\frac{1717-101}{2828+404}\)

Answer 1

a) \(\frac{2.7.13}{26.35}=\frac{2.7.13}{2.13.7.5}=\frac{1}{5}\)

b) \(\frac{3.5.11.13}{33.35.37}=\frac{3.5.11.13}{3.11.7.5.37}=\frac{13}{259}\)

c) \(\frac{23.5-23}{4-27}=\frac{23.\left(5-1\right)}{-23}=\frac{4}{-1}=-4\)

d) \(\frac{1717-101}{2828+404}=\frac{101.17-101}{404.7+404}=\frac{101.\left(17-1\right)}{404.\left(7+1\right)}=\frac{101.16}{404.8}=\frac{101.2.8}{101.4.8}=\frac{1}{2}\)

Answer 2

https://i.imgur.com/D73H4uj.jpg