Viết phân số 1/3 thành tổng của 2 phân có là 1 và mẫu số khác nhau .
Viết tất că các phân số bé hơn 1 có tổng tử số và mẫu số = 10
Ai nhanh mình tích cho
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1 + 9 = 10
2 + 8 = 10
3 + 7 = 10
4 + 6 = 10
Có thể lập tất cả: 1/9 ; 2/8 ; 3/7 ; 4/6
\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}\)\(+\frac{1}{2}\)
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Ta có:\(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
Vậy \(\frac{7}{8}=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)
cho mình sửa đề bài. viết đc dưới dạng stp hữu hạn nha
các phân số nhỏ hơn đơn vị có tổng tử số và mẫu số =10 là: 1/9; 2/8; 3/7 ;4/6;
1/3=1/12+1/4
Các phân số thỏa mãn:1/9,2/8,3/7,4/6