\(\dfrac{5}{12}=\dfrac{5\times2}{12\times2}=\dfrac{10}{24};\dfrac{7}{24}\)
\(\dfrac{5}{12}=\dfrac{5\times2}{12\times2}=\dfrac{10}{24};\dfrac{7}{24}giữ.nguyên\)
5/12=5x24/12x24=120/288
7/24=7x12/24x12=84/288
b) và ………………………………………………………………….….
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