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3 tháng 2 2023

`25/50=(25:25)/(50:25)=1/2`

`15/120=(15:15)/(120:15)=1/8`

`64/720=(64:16)/(720:16)=4/45`

`5/25=(5:5)/(25:5)=1/2`

`6/9=(6:3)/(9:3)=2/3`

`48/96=(48:48)/(96:48)=1/2`

`42/98=(42:14)/(98:14)= 3/7`

`18/30=(18:6)/(30:6)=3/5`

`80/240=(80:80)/(240:80)=1/3`

3 tháng 2 2023

Bài 3:
\(\dfrac{25}{50}=\dfrac{25:25}{50:25}=\dfrac{1}{2}\)
\(\dfrac{15}{120}=\dfrac{15:15}{120:15}=\dfrac{1}{8}\)
\(\dfrac{64}{720}=\dfrac{64:16}{720:16}=\dfrac{4}{45}\)
\(\dfrac{5}{25}=\dfrac{5:5}{25:5}=\dfrac{1}{5}\)
\(\dfrac{6}{9}=\dfrac{6:3}{9:3}=\dfrac{2}{3}\)
\(\dfrac{48}{96}=\dfrac{48:48}{96:96}=\dfrac{1}{2}\)
\(\dfrac{42}{98}=\dfrac{42:14}{98:14}=\dfrac{3}{7}\)
\(\dfrac{18}{30}=\dfrac{18:6}{30:6}=\dfrac{3}{5}\)
\(\dfrac{80}{240}=\dfrac{80:80}{240:80}=\dfrac{1}{3}\)

21 tháng 2 2021

ik mọi người

3 tháng 2 2023

`160/320=(160:10)/(320:10)=16/32=(16:2)/(32:2)=8/16=(8:2)/(16:2)=4/8=1/2`

3 tháng 2 2023

Bài 2:
\(\dfrac{160}{320}=\dfrac{16}{x}=\dfrac{y}{16}=\dfrac{4}{z}=\dfrac{1}{2}\)
\(x=\dfrac{16\times320}{160}=32\)
\(y=\dfrac{16\times16}{32}=8\)
\(z=\dfrac{4\times2}{1}=8\)

29 tháng 4 2019

Bài kiểm tra trên máy thì tùy thuộc vào các phần mềm học. Bài kiểm tra ngoài giấy thì bạn nối bằng bút chì hoặc bút bi

ai tim dc so 9

888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888988888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888888

2 tháng 12 2021

đâu lm bài nào đâu em

Bài 3 nào hả bn

@Mina

#hoangphuong

29 tháng 12 2021

trời ơi ko đặt tính dc đừng bắt ngk đặt tính nxx

29 tháng 12 2021

8695 dư 5 nhá bạn nhớ tick cho mình 

20 tháng 4 2023

\(x+\dfrac{1}{5}-\dfrac{3}{7}=\dfrac{6}{35}\)
\(x+\dfrac{1}{5}=\dfrac{6}{35}+\dfrac{3}{7}\)
\(x+\dfrac{1}{5}=\dfrac{6}{35}+\dfrac{15}{35}\)
\(x+\dfrac{1}{5}=\dfrac{21}{35}\)
\(x=\dfrac{21}{35}-\dfrac{1}{5}\)
\(x=\dfrac{21}{35}-\dfrac{7}{35}\)
\(x=\dfrac{14}{35}=\dfrac{2}{5}\)

20 tháng 4 2023

\(x\) + \(\dfrac{1}{5}\) - \(\dfrac{3}{7}\) = \(\dfrac{6}{35}\) 

\(x\) + \(\dfrac{1}{5}\) = \(\dfrac{6}{35}\) + \(\dfrac{3}{7}\)

\(x\) + \(\dfrac{1}{5}\) = \(\dfrac{3}{5}\)

\(x\)       = \(\dfrac{3}{5}\) - \(\dfrac{1}{5}\)

\(x\) =\(\dfrac{2}{5}\)