`7/2=(7xx5)/(2xx5)=35/10`
hay là :
`7/1=(7xx10)/(1xx10)=70/10`
mẫu là `1` mà dòng thứ `2` bạn viết `2` là sao ạ
Đúng 3
Bình luận (2)
Các câu hỏi tương tự
dfrac{15}{14} : dfrac{10}{21} x dfrac{1}{5}
5 x dfrac{1}{5} + dfrac{1}{5}
7 : dfrac{1}{5} - dfrac{1}{5}
6 + dfrac{1}{5} : 2
8 - dfrac{1}{5} x 7
Đọc tiếp
\(\dfrac{15}{14}\) : \(\dfrac{10}{21}\) x \(\dfrac{1}{5}\)
\(5\) x \(\dfrac{1}{5}\) + \(\dfrac{1}{5}\)
\(7\) : \(\dfrac{1}{5}\) - \(\dfrac{1}{5}\)
\(6\) + \(\dfrac{1}{5}\) : \(2\)
\(8\) - \(\dfrac{1}{5}\) x \(7\)
Đúng ghi Đ, sai ghi S
a) dfrac{3}{10} 0,3 .......
dfrac{3}{10}0,3 .......
b)dfrac{135}{100}1,35 ....
dfrac{135}{100}1,35 ........
c) 1dfrac{7}{100}1,7 ......
1dfrac{7}{100} 1,7
Đọc tiếp
Đúng ghi Đ, sai ghi S
a) \(\dfrac{3}{10}< 0,3\) .......
\(\dfrac{3}{10}=0,3\) .......
b)\(\dfrac{135}{100}=1,35\) ....
\(\dfrac{135}{100}>1,35\) ........
c) 1\(\dfrac{7}{100}>1,7\) ......
1\(\dfrac{7}{100}< 1,7\)
\(a,\dfrac{1}{3}và\dfrac{2}{5}\) \(b,\dfrac{3}{7}và\dfrac{8}{9}\) \(c,\dfrac{3}{5}và\dfrac{7}{10}\) \(d,\dfrac{1}{3}và\dfrac{5}{6}\)
Tính bằng cách thuận tiện nhất
a, \(\dfrac{1}{10}+\dfrac{2}{10}+\dfrac{3}{10}+\dfrac{4}{10}+\dfrac{5}{10}+\dfrac{6}{10}+\dfrac{7}{10}+\dfrac{8}{10}+\dfrac{9}{10}\)
b, 13,25 : 0,5 + 13,25 : 0,25 + 13,25 : 0,125 + 13,25 x 6
Giúp mình với mình đang gấp
Bài 2 Tìm y
a) \(\dfrac{1}{2}-2xy=\dfrac{9}{20}\) b)\(\dfrac{3}{5}:\dfrac{4}{3}:y=2+\dfrac{7}{10}\) c) y + y x\(\dfrac{3}{2}-y\) x \(\dfrac{1}{2}=\dfrac{1}{10}\)
Tính :
\(A.\dfrac{25}{7}-2+\dfrac{3}{2}\)
\(B.\dfrac{4}{5}x\dfrac{10}{3}:8\)
\(C.\dfrac{7}{3}+\dfrac{2}{5}:\dfrac{1}{6}\)
So sánh
\(\dfrac{7}{10}\)\(...\)\(\dfrac{43}{100}\) \(\dfrac{6}{10}\)\(...\)\(\dfrac{85}{100}\) \(\dfrac{7}{10}\)\(...\)\(\dfrac{70}{100}\)
bài 1:
2 : y x \(\dfrac{3}{5}\) = \(\dfrac{9}{10}\) \(\dfrac{5}{4}-\dfrac{2}{5}:\) y = 1 \(\dfrac{3}{4}x\) (\(\dfrac{7}{2}\) - y) =\(\dfrac{3}{2}\)
Tính:
a) (6 : dfrac{3}{5} 1dfrac{1}{6} x dfrac{6}{7} ) : ( 4dfrac{1}{5} x dfrac{10}{11} + 5dfrac{2}{11} )
b) (1-dfrac{1}{2}) x (1-dfrac{1}{3}) x (1-dfrac{1}{4}) x ..... x (1-dfrac{1}{2003}) x (1-dfrac{1}{2007})
Đọc tiếp
Tính:
a) (6 : \(\dfrac{3}{5}\) \(1\dfrac{1}{6}\) x \(\dfrac{6}{7}\) ) : ( \(4\dfrac{1}{5}\) x \(\dfrac{10}{11}\) + \(5\dfrac{2}{11}\) )
b) (\(1-\dfrac{1}{2}\)) x (\(1-\dfrac{1}{3}\)) x (\(1-\dfrac{1}{4}\)) x ..... x (\(1-\dfrac{1}{2003}\)) x (\(1-\dfrac{1}{2007}\))