\(\dfrac{3}{7}:2=\dfrac{3}{7}.\dfrac{1}{2}=\dfrac{3.1}{7.2}=\dfrac{3}{14}\)
Đúng 5
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\(\dfrac{3}{7}\div2=\dfrac{3}{7}\div\dfrac{2}{1}=\dfrac{3\times1}{7\times2}=\dfrac{3}{14}\)
Đúng 1
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