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201,ab : 126 = 1,ab
=> 201ab : 126 = 1ab
126 x 1ab = 201ab
12600 + 126 x ab = 20100 + ab
126 x ab = 7500 + ab
125 x ab = 7500
ab = 7500 : 125
ab = 60
Vậy : a = 6 ; b = 0
1,ab x 126 = 201,ab
( 100 + ab ) x 126 = 20100 + ab
12600 + 126ab = 20100 + ab
126ab - ab = 20100 - 12600
125ab = 7500
=> ab = 7500 : 125
=> ab = 60
![](https://rs.olm.vn/images/avt/0.png?1311)
=> 201,ab : 126 = 1ab 126 x 1ab = 20 100 + ab 126 x ab = 7500 + ab
125 x ab = 7500 ab
= 7500 : 125 ab = 60
Vậy a = 6 ; b = 0.
![](https://rs.olm.vn/images/avt/0.png?1311)
a) aaa,a : a,a = aba
=> aaaa : aa = aba
=> aba = 101
Vậy : a = 1 ; b = 0
b) 201,ab : 126 = 1,ab
=> 201ab : 126 = 1ab 126 x 1ab = 201ab
12600 + 126 x ab = 20100 + ab 126 x ab = 7500 + ab
125 x ab = 7500 ab
= 7500 : 125 ab = 60
Vậy : a = 6 ; b = 0
![](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)
201,ab:126=1,ab
suy ra :201ab:126=1ab
126*1ab=201ab
12600+126*ab=20100+ab
126*ab=7500+ab
hay125*ab=7500
ab=7500:125
ab=60
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\overline{1,ab}=\overline{201,ab}\div126\)
\(\overline{201,ab}\div\overline{1,ab}=126\)
\(201+\overline{0,ab}=126\times1+126\times\overline{0,ab}\)
\(201=126+125\times\overline{0,ab}\)
\(125\times\overline{0,ab}=201-126=75\)
\(\overline{0,ab}=75\div125=0,60\)
Vậy a = 6; b = 0
![](https://rs.olm.vn/images/avt/0.png?1311)