Lời giải:

Theo bài ra ta có:

$x=\frac{3}{5}y$

$x+24=3y$

$\Rightarrow 24=3y-\frac{3}{5}y$

$\Rightarrow 24 = \frac{12}{5}y$

$\Rightarrow y=24.5:12=10$ 

$x=\frac{3}{5}.10=6$

Vậy phân số ban đầu là $\frac{6}{10}$

52

0.4

2/3

a,52

b,0,4

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

a 4/5 của 65dm là 52dm
b 24 giây = 2,5 phút
c 18/27 = 2/3

1/2 , 1/5, 4/7,  2/3 , 5/3

5/10=1/2

3/15=1/5

40/70=4/7

24/36=2/3

70/42=5/3

CHÚC BÀ HỌC GIỎI

bài làm:

5/10=1/2  3/15=1/5  40/70=4/7   24/36=4/6   70/42=5/3

học tốt nha :3

-24/42=-4/7

-24/36=-2/3

-8/56=-1/7

29/-87=-1/3

51/-18=-17/3

Kết quả rút gọn làn lượt là:  1 2 ; 1 2 ; − 1 5 ; 1 2 ; 3 8 ; 2 3 ; 3 2 ; − 5 9

\(\dfrac{3}{6}=\dfrac{3:3}{6:3}=\dfrac{1}{2}\\ \dfrac{18}{24}=\dfrac{18:6}{24:6}=\dfrac{3}{4}\\ \dfrac{5}{35}=\dfrac{5:5}{35:5}=\dfrac{1}{7}\\ \dfrac{40}{90}=\dfrac{40:10}{90:10}=\dfrac{4}{9}\\ \dfrac{75}{30}=\dfrac{75:15}{30:15}=\dfrac{5}{2}\)

\(\dfrac{3}{6}=\dfrac{3:3}{6:3}=\dfrac{1}{2}\\ \dfrac{18}{24}=\dfrac{18:6}{24:6}=\dfrac{3}{4}\\ \dfrac{5}{35}=\dfrac{5:5}{35:5}=\dfrac{1}{7}\\ \dfrac{40}{90}=\dfrac{40:10}{90:10}=\dfrac{4}{9}\\ \dfrac{75}{30}=\dfrac{75:15}{30:15}=\dfrac{5}{2}\)

\(\dfrac{3}{6}=\dfrac{3:3}{6:3}=\dfrac{1}{2}\)

\(\dfrac{18}{24}=\dfrac{18:6}{24:6}=\dfrac{3}{4}\)

\(\dfrac{5}{35}=\dfrac{5:5}{35:5}=\dfrac{1}{7}\)

\(\dfrac{40}{90}=\dfrac{40:10}{90:10}=\dfrac{4}{9}\)

\(\dfrac{75}{30}=\dfrac{75:15}{30:15}=\dfrac{5}{2}\)

3/125

3/125

\(\dfrac{24}{1000}=\dfrac{24:8}{1000:8}=\dfrac{3}{125}\)

\(\dfrac{-4}{35}\)

-4/35

1/2

1/2

1/2