Đề bài: viết mỗi phân số sau thành tổng của 2 phân số tối giản.
a, 7/15 = ..............
b, 13/27 = ...............
c, 3/18 = .................
d, 1/10 = ...............
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\(a,\dfrac{7}{15}=\dfrac{2}{15}+\dfrac{1}{3}\\ b,\dfrac{13}{27}=\dfrac{10}{27}+\dfrac{1}{9}\\ c,\dfrac{3}{18}=\dfrac{1}{18}+\dfrac{1}{9}\\ d,=\dfrac{1}{20}+\dfrac{1}{20}\)
a) 7 / 15 = 1 / 15 + 6 / 15
b) 13/27=11 / 27 + 2 / 27
c) 3 /18 = 1 / 9 + 1 / 18
d) 1 / 10 = 3/ 50 + 1 / 25
k mình nha!
a) 7 / 15 = 1 / 15 + 6 / 15
b) 13/27=11 / 27 + 2 / 27
c) 3 /18 = 1 / 9 + 1 / 18
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
\(\dfrac{7}{12}=\dfrac{3}{12}+\dfrac{4}{12}=\dfrac{1}{4}+\dfrac{1}{3}\)
\(\dfrac{13}{27}=\dfrac{9}{27}+\dfrac{4}{27}=\dfrac{1}{3}+\dfrac{4}{27}\)
\(\dfrac{7}{12}\) = \(\dfrac{1+6}{12}\) = \(\dfrac{1}{12}\) + \(\dfrac{6}{12}\) = \(\dfrac{1}{12}\) + \(\dfrac{1}{2}\)
\(\dfrac{7}{12}\) = \(\dfrac{3+4}{12}\) = \(\dfrac{3}{12}\) + \(\dfrac{4}{12}\) = \(\dfrac{1}{4}\) + \(\dfrac{1}{3}\)
\(\dfrac{13}{27}\) = \(\dfrac{1+12}{27}\) = \(\dfrac{1}{27}\) + \(\dfrac{12}{27}\) = \(\dfrac{1}{27}\) + \(\dfrac{4}{9}\)
\(\dfrac{13}{27}\) = \(\dfrac{4+9}{27}\) = \(\dfrac{4}{27}\) + \(\dfrac{9}{27}\) = \(\dfrac{4}{27}\) + \(\dfrac{1}{3}\)
\(\dfrac{13}{27}\) = \(\dfrac{6+7}{27}\) = \(\dfrac{6}{27}\) + \(\dfrac{7}{27}\) = \(\dfrac{2}{9}\) + \(\dfrac{7}{27}\)
a) \(\frac{7}{12}=\frac{1}{3}+\frac{1}{4}\)
b) \(\frac{13}{27}=\frac{4}{27}+\frac{1}{3}\)
7/15 = 1/15 + 2/5
13/27 = 1/27 + 4/9
3/18 = 1/18 + 1/9
`7/15 = 1/5 +4/15`
`13/27 = 2/9 +7/27`
`3/18 = 1/6 = 1/7+1/42`
`1/10 = 1/15+1/30`