\(a) \frac{1}{4};\frac{3}{7};\frac{101}{131}\)

\(15\div\frac{15}{45}\div15=\frac{1}{3}\)
 

\(\frac{72}{90}=72\div\frac{18}{90}\div18=\frac{4}{5}\)
 

\(50\div\frac{10}{120}\div10=\frac{5}{12}\)

1000000000000% đúng nha

\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)

\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)

\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)

\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)

\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)

\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)

\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)

a) -15/90=-5/30=1/6

120/600=12/60=4/20=1/5

-75/150=-15/30=-5/10=-1/2

b)54/-90=6/-10=3/-5

-180/288=-90/144=-10/16=-5/8

60/-135=20/-45=4/-9

c 212121/353535

=212121:21/353535:35

=10101/10101

=212121:10101/353535:10101

=21/35

\(\frac{195}{221}=\frac{15}{17}\)

quá dễ!! 676578768768943543525634636456456457467657657

giúp mình đi mà

-15/90 = -1/6

120/600 = 1/5

cac bạn làm đầy đủ lời giải hộ mình nha

=4/5 nha

\(\frac{120}{150}=\frac{120:3}{150:3}=\frac{40}{50}\)

a) 15 / 18 = 5/6 ( rút gọn cho 3)

b) 30/120 = 1/4 (rút gọn cho 30)

c) 45 / 27 = 5/3 ( rút gọn cho 9 )

d) 75 / 300 = 1/4 (rút gọn cho 75)

a)là \(\frac{5}{6}\)               b)là \(\frac{1}{4}\)              c)là \(\frac{5}{3}\)                   d)là \(\frac{1}{4}\)

tik nha bạn thân!