Viết phân số 7/12 thành tổng của 2 phân số đều có tử số là 1
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HT
8 tháng 8 2017
\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}\)\(+\frac{1}{2}\)
CC
3
23 tháng 2 2016
Ta có:\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
Vậy \(\frac{7}{8}=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)
20 tháng 2 2022
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HP
2
5 tháng 3 2017
3/4 có 1 cách duy nhất
chẳng hạn
3/4=1/2+1/4
ai k minh minh k lai
\(\frac{7}{12}=\frac{1}{12}+\frac{6}{12}=\frac{1}{12}+\frac{1}{2}\)
7/12 = 1/12 + 6/12 = 1/12 + 1/2 ( đúng )
Làm theo phương pháp lựa chọn rồi rút gọn phân số.
7/12 = 2/12 + /12 ( loại )
7/12 = 3/12 + 4/12 = 1/4 + 1/3 ( đúng )