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\(\frac{7}{11}\)= \(\frac{7x6}{11x6}\)= \(\frac{42}{66}\)
\(\frac{3}{11}\)=\(\frac{3x6}{11x6}\)=\(\frac{18}{66}\)
Hi vọng bạn không ăn gian, chúc bạn học tốt.
Ta có:\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
Vậy \(\frac{7}{8}=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)
số bé nhất có 2 chữ số : 10
số lớn nhất có 2 chữ số : 99
(99-10)+1 = 90 số
(90-28) = 62 số có 2 chữ số và mẫu hơn tử số 28 đơn vị
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