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\(\frac{3}{5}-\frac{1}{4}:x=\frac{25}{100}\)
\(\frac{1}{4}:x=\frac{3}{5}-\frac{25}{100}\)
\(\frac{1}{4}:x=\frac{7}{20}\)
\(x=\frac{1}{4}:\frac{7}{20}\)
\(x=\frac{5}{7}\)
Vậy : \(x=\frac{5}{7}\)
k mik nha bn
3/5-1/4:x=25/100
1/4:x=3/5-25/100
1/4:x=7/20
x=1/4:7/20
x=5/7
3/5-1/4:x=25/100
1/4:x=25/100+3/5
1/4:x=17/20
x=17/20x1/4
x=17/80
Vậy x=17/80
\(\frac{3}{5}-\frac{1}{4}:x=\frac{25}{100}\)
\(\frac{3}{5}-\frac{1}{4}:x=\frac{1}{4}\)
\(\frac{1}{4}:x=\frac{3}{5}-\frac{1}{4}\)
\(\frac{1}{4}:x=\frac{7}{20}\)
\(x=\frac{1}{4}:\frac{7}{20}\)
\(x=\frac{5}{7}\)
bg:
3/5-1/4:x =25/100
1/4:x =3/5-25/100
1/4:x =7/20
x = 1/4:7/20
x =5/7
\(\frac{3}{5}-\frac{1}{4}:x=\frac{25}{100}\)
\(\frac{3}{5}-\frac{1}{4}:x=\frac{1}{4}\)
\(\frac{1}{4}:x=\frac{3}{5}-\frac{1}{4}\)
\(\frac{1}{4}:x=\frac{7}{20}\)
\(x=\frac{1}{4}:\frac{7}{20}\)
\(x=\frac{1}{4}.\frac{20}{7}\)
\(x=\frac{5}{7}\)
\(\frac{3}{5}-\frac{1}{4}:x=\frac{25}{100}\)
\(\frac{1}{4}:x=\frac{3}{5}-\frac{25}{100}\)
\(\frac{1}{4}:x=\frac{7}{20}\)
\(x=\frac{5}{7}\)
Vậy \(x=\frac{5}{7}\)
\(=\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{13}{4}+\dfrac{3}{4}-\dfrac{1}{20}=4+\left(\dfrac{1}{4}-\dfrac{1}{5}-\dfrac{1}{20}\right)=4+0=4\)
(1-1/2) x (1-1/3) x .... x (1-1/100)
= 1/2 x 2/3 x ... x 99/100
= 1x2x...x99/2x3x..x100
= 1/ 100
a, \(\frac{3}{5}+25-\frac{1}{5}\)
\(=\left(\frac{3}{5}-\frac{1}{5}\right)+25\)
\(=\frac{2}{5}+25\)
\(=25\frac{2}{5}\)
\(=25,4\)
b, \(13.3.32,27+67,63.39\)
\(=39.32,27+67,63.39\)
\(=39\left(32,37+67,63\right)\)
\(=39.100\)
\(=3900\)
c, \(\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).\left(1-\frac{1}{4}\right)....\left(1-\frac{1}{100}\right)\)
\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}......\frac{99}{100}\)
\(=\frac{1}{100}\)
\(\frac{3}{5}-\frac{1}{4}\div x=\frac{25}{100}\)
\(\frac{3}{5}-\frac{1}{4}\div x=\frac{1}{4}\)
\(\frac{1}{4}\div x=\frac{3}{5}-\frac{1}{4}\)
\(\frac{1}{4}\div x=\frac{7}{20}\)
\(x=\frac{1}{4}\div\frac{7}{20}\)
\(x=\frac{5}{7}\)
Ta có: 3/5 - 1/4 : x = 25/100
=> 1/4 : x = 3/5 - 25/100
=> 1/4 : x = 7/20
=> x = 1/4 : 7/20
=> x = 5/7
Vậy x = 5/7