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Bài 2:
\(\frac{13}{36}=\frac{1+5+7}{36}=\frac{1}{36}+\frac{5}{36}+\frac{7}{36}\)
\(\frac{31}{60}=\frac{1+23+7}{60}=\frac{1}{60}+\frac{23}{60}+\frac{7}{60}\)
Bài 1:
\(\frac{25}{27}=\frac{1+3+9+3+9}{27}=\frac{1}{27}+\frac19+\frac13+\frac19+\frac13\)
\(\frac{15}{16}=\frac{8+7}{16}=\frac12+\frac{7}{16}=\frac12+\frac{4+3}{16}=\frac12+\frac14+\frac{3}{16}\)
\(=\frac12+\frac14+\frac{2+1}{16}=\frac12+\frac14+\frac18+\frac{1}{16}\)
10/27: 1/27+7/27+2/27
13/12: 1/12+7/12+5/12
15/8:7/8+3/8+5/8
10/27 = 1/27+2/27+7/27
13/12 = 1/12+5/12+7/12
15/8 = 3/8+5/8+7/8
Trả lời :
\(\frac{1}{10}=\frac{0}{10}+\frac{2}{10}+\left(-\frac{1}{10}\right)\)
C2 : \(\frac{1}{10}=\frac{1}{10}+\frac{0}{10}+\frac{0}{10}\)
\(\dfrac{14}{21}=\dfrac{14:7}{21:7}=\dfrac{2}{3}=\dfrac{1}{3}+\dfrac{1}{3}\)
\(\dfrac{15}{29}=\dfrac{1+14}{29}=\dfrac{1}{29}+\dfrac{14}{29}\)
\(\dfrac{9}{35}=\dfrac{1+8}{35}=\dfrac{1}{35}+\dfrac{8}{35}\)
\(\dfrac{16}{27}=\dfrac{2+14}{27}=\dfrac{2}{27}+\dfrac{14}{27}\)