\(1-\dfrac{7}{10}=\dfrac{10}{10}-\dfrac{7}{10}=\dfrac{10-7}{10}=\dfrac{3}{10}\)
\(1-\dfrac{7}{10}=\dfrac{10}{10}-\dfrac{7}{10}=\dfrac{10-7}{10}=\dfrac{3}{10}\)
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\(\dfrac{7}{100}< 1,7\)
\(\dfrac{15}{14}\) : \(\dfrac{10}{21}\) 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 \(7\)
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
\(\dfrac{7}{1}\)= \(\dfrac{7x.....}{2x.....}\) = \(\dfrac{.....}{10}\)
\(a,\dfrac{1}{3}và\dfrac{2}{5}\) \(b,\dfrac{3}{7}và\dfrac{8}{9}\) \(c,\dfrac{3}{5}và\dfrac{7}{10}\) \(d,\dfrac{1}{3}và\dfrac{5}{6}\)
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 :
\(A.\dfrac{25}{7}-2+\dfrac{3}{2}\)
\(B.\dfrac{4}{5}x\dfrac{10}{3}:8\)
\(C.\dfrac{7}{3}+\dfrac{2}{5}:\dfrac{1}{6}\)
Tìm x:
a) x - 1\(\dfrac{3}{5}\)= 2\(\dfrac{1}{10}\) b) \(5\dfrac{1}{7}\) : x = \(4\dfrac{1}{2}\)
So sánh
\(\dfrac{7}{10}\)\(...\)\(\dfrac{43}{100}\) \(\dfrac{6}{10}\)\(...\)\(\dfrac{85}{100}\) \(\dfrac{7}{10}\)\(...\)\(\dfrac{70}{100}\)
\(\dfrac{1}{4}\) giờ = ... phút
\(\dfrac{1}{3}\) ngày = .... phút
\(\dfrac{5}{6}\) phút = .. giây
\(\dfrac{7}{10}\) phút = ... giây