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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{63}{45}-\dfrac{20}{25}=\dfrac{7}{5}-\dfrac{4}{5}=\dfrac{3}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{63}{45}-\frac{20}{25}\)
\(=\frac{63}{45}-\frac{4}{5}\)
\(=\frac{63}{45}-\frac{36}{45}\)
\(=\frac{27}{45}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`4/7+4`
`=4/7+4/1`
`=4/7+28/7`
`=32/7`
__
`3+6/11`
`=33/11+6/11`
`=39/11`
__
`3-5/7`
`=3/1-5/7`
`=21/7-5/7`
`=16/7`
__
`21/9-2`
`=21/9-18/9`
`=3/9`
`=1/3`
__
`15/24+2`
`=15/24+48/24`
`=63/24`
`=21/16`
__
`63/45-20/25`
`=63/45-4/5`
`=63/45-36/45`
`=27/45`
`=9/15`
__
`3/4-2/8`
`=3/4-1/4`
`=2/4`
__
`6/7-5/8`
`=48/56-35/56`
`=13/56`
__
`37/45-5/9`
`=37/45-25/45`
`=12/45`
`=4/15`
__
`46/39-11/13`
`=46/39-33/39`
`=13/39`
`=1/2`
__
`5/12+3/4+1/3`
`=5/12+9/12+4/12`
`=14/12+4/12`
`=18/12`
`=3/2`
__
`1/2+3/7+11/14`
`=7/14+6/14+11/14`
`=13/14+11/14`
`=24/14`
`=12/7`
__
`7/10-(1/5+1/4)`
`=7/10-(4/20+5/20)`
`=7/10-9/20`
`=14/20-9/20`
`=5/20`
`=1/4`
__
`15/4-2/3-3/4`
`=(15/4-3/4)-2/3`
`=12/4-2/3`
`=3-2/3`
`=9/3-2/3`
`=7/3`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\dfrac{1}{5}+\dfrac{2}{5}+\dfrac{3}{5}=\dfrac{6}{5}\)
\(\dfrac{11}{55}+\dfrac{14}{35}+\dfrac{15}{25}\)
\(=\dfrac{1}{5}+\dfrac{2}{5}+\dfrac{3}{5}\)
\(=\dfrac{1+2+3}{5}\)
\(=\dfrac{6}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(67855:45=\frac{13571}{9}\)
\(12675:25=507\)
\(23052:63=\frac{7684}{21}\)
hok tốt!!
67855:45=1507,8888...
12675:25=507
23052:63=365,9047...
Hok tốt!!!
45 + 63 + 25 + 14 + 55
= ( 45 + 55 ) + 63 + 25 + 14
= 100 + 63 + 25 + 14
= 163 + 25 + 14
= 188 + 14
= 202
số đó là
202
ai k mình
mình k lại cho