987654321+123456789=?
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
123456789 < 987654321
987654321 > 123456789
Chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
UCLN(123456789;987654321)=1
BCNN(123456789;987654321) = 1
![](https://rs.olm.vn/images/avt/0.png?1311)
123456789+123456789=246913578
987654321+987654321=1975308642
![](https://rs.olm.vn/images/avt/0.png?1311)
=123456789-987654321=-864197532+123456789=-740740743
k cho mình 1 cái đi
![](https://rs.olm.vn/images/avt/0.png?1311)
x + 123456789 - 123456789 = 987654321
x = 987654321 + 123456789 - 123456789
x = 987654321
Duyệt mình nha
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta co: \(M=\frac{2013}{123456789}+\frac{2014}{987654321}=\frac{2013}{123456789}+\frac{2013}{987654321}+\frac{1}{987654321}\)
\(N=\frac{2013}{123456789}+\frac{1}{123456789}+\frac{2013}{987654321}\)
ma \(\frac{1}{987654321}< \frac{1}{123456789}\) nen \(M< N\)
\(M=\frac{2013}{123456789}+\frac{2014}{987654321}\)
\(N=\frac{2014}{123456789}+\frac{2013}{987654321}\)
\(M=\frac{2014}{987654321}-\frac{1}{987654321}\)
\(N=\frac{2014}{123456789}-\frac{1}{123456789}\)
Ta thấy \(\frac{1}{123456789}>\frac{1}{987654321}\)
\(\Rightarrow M< N\)
987654321 + 123456789 =1111111110
=1111111110 nhé
HT