14/24 : 2 = 7/12

10/36 : 2 = 5/18

\(\dfrac{5}{27}=\dfrac{5}{27}\)

\(\dfrac{14}{24}=\dfrac{14:2}{24:2}=\dfrac{7}{12}\)

\(\dfrac{10}{36}=\dfrac{10:2}{36:2}=\dfrac{5}{18}\)

82/80=82:2/80:2=41/40

36/120=36:12/120:12=3/10

49/98=49:49/98:49=1/2

105/315=105:3/315:3=35/105=35:5/105:5=7/21 hoặc 105/315=105:15/315:15=7/21

114/1152=114:2/1152:2=57/576

t mình nha

\(\dfrac{75}{100}=\dfrac{3}{4};\dfrac{63}{126}=\dfrac{1}{2}\\ \dfrac{36}{27}=1\dfrac{1}{3};\dfrac{81}{54}=1\dfrac{1}{2};\dfrac{105}{405}=\dfrac{7}{27}\)

\(\dfrac{3}{4}\)

\(\dfrac{1}{2}\)

\(\dfrac{4}{3}\)

\(\dfrac{3}{2}\)

\(\dfrac{4}{15}\)

18/30=3/10

36/27=4/3

64/80=4/5

45/35=/9/7

ai thấy đúng thì k nha rùi mình k lại cho

\(\frac{18}{30}=\frac{18:6}{30:6}=\frac{3}{5}\)

\(\frac{36}{27}=\frac{36:9}{27:7}=\frac{4}{3}\)

\(\frac{64}{80}=\frac{64:16}{80:16}=\frac{4}{5}\)

\(\frac{45}{35}=\frac{45:5}{35:5}=\frac{9}{7}\)

\(a.\frac{36}{48}=\frac{36:12}{48:12}=\frac{3}{9}\)

\(b.\frac{54}{68}=\frac{54:2}{68:2}=\frac{27}{34}\)

\(c.\frac{105}{90}=\frac{105:15}{90:15}=\frac{7}{6}\)

\(d.\frac{5454}{6868}=\frac{5454:202}{6868:202}=\frac{27}{34}\)

a 36/48 = 3/4

54/68 = 27/34

105/90 = 7/6

5454/6868 = 27/34

giúp mình đi mà

80/24=10/3

-18

-90/5= -18

\(\dfrac{3.\left(-5\right)}{15.\left(-6\right)}=\dfrac{3.\left(-5\right)}{\left(-5\right)\left(-3\right)\left(-6\right)}=\dfrac{-1}{-6}=\dfrac{1}{6}\)

12:

a: 40*7*25=8*5*7*25 chia hết cho 8

b: 32*19*28=8*4*19*28 chia hết cho 8

c: 4*35*2*39=8*35*39 chia hết cho 8

d: 14*27*4*15=2*4*7*27*15=8*7*25*15 chia hết cho 8