36x4+36x4-36x3
(KO BẮT BUỘC PHẢI LM)
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\(\frac{120}{150}=\frac{120:3}{150:3}=\frac{40}{50}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{17}{23}=\frac{1717}{2323}\)vì
\(\frac{17}{23}\times\frac{101}{101}=\frac{1717}{2323}\)
1717 / 2323 = (17 x 101) / (23 x 101) = 17/23
Suy ra 17/23 = 1717/2323
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\(\frac{5}{6},\frac{7}{18}\)
\(=\frac{5}{6}=\frac{5x3}{6x3}=\frac{15}{18}\)
5 5 x 3 15
____________ = _______________ = _______________
6 6 x 3 18
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{5}{6}\)= \(\frac{20}{24}\)
\(\frac{9}{8}\)= \(\frac{27}{24}\)
\(\frac{5}{6}\);\(\frac{9}{8}\)
\(\Leftrightarrow\frac{5}{6}=\frac{5\times4}{6\times4}=\frac{20}{24}\)
\(\Leftrightarrow\frac{9}{8}=\frac{9\times3}{8\times3}=\frac{27}{24}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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\(\frac{43}{82}:\frac{5}{3}=\frac{43}{82}x\frac{3}{5}=\frac{129}{410}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
TL
\(\frac{14}{16}.\frac{26}{18}=\frac{91}{72}\)
HT
@@@@@@@@
= 180
HT
36 x 4 + 36 x 4 - 36 x 3
= ( 36 x 4 ) + ( 36 x 4 ) - ( 36 x 3 )
= 36 x ( 6 + 4 - 3 )
= 36 x 7
= 252