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H
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`
S
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 2022
3 nhân 3 nhân 2 nhân 4 nhân 5=5
3 nhân 2 nhân 4 nhân 5 nhân 3 =5
đáp số là 1
21 tháng 2 2022
\(\frac{9\times8\times5}{6\times4\times15}=\frac{360}{360}=1\)
CC
5
19 tháng 6 2017
A = 1 + 1 + 2 + 3 + 5 + 8 + 13 + 21 + 34 + 55 + 89 + 144
A= (1+1+8) + ( 2+3+5) + (21+34+55) + 13+89 + 144
A= 10 + 10 + 110 + 246
A= 130 + 246
A= 376
TV
19 tháng 6 2017
Vũ Thùy Linh
A = 1 + 1 + 2 + 3 + 5 + 8 + 13 + 21 + 34 + 55 + 89 + 144
A= ﴾1 + 1 + 8﴿ + ﴾ 2 + 3 + 5 ﴿ + ﴾21 + 34 + 55﴿ + 13 + 89 + 144
A= 10 + 10 + 110 + 246
A= 130 + 246
A= 376
Chúc bạn học tốt !!!
H
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`
26 tháng 2 2021
ai tim dc so 9
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