1. 3/8-1/6.x=1/4
1/6.x=3/8-1/4
1/6.x=1/8
x=1/8:1/6
x=3/4
2. Mảnh vải dài: (3,6:72).100=5 (m)
3. Ư(12) = \(\left\{1;2;3;4;6;12\right\}\)
Cho mk bổ sung bài 3 nha!
Ư(12)=\(\left\{1;2;3;4;6;12;-1;-2;-3;-4;-6;-12\right\}\)
1.
\(\frac{3}{8}-\frac{1}{6}\cdot x=\frac{1}{4}\)
\(\frac{1}{6}\cdot x=\frac{3}{8}-\frac{1}{4}\)
\(\frac{1}{6}\cdot x=\frac{1}{8}\)
\(x=\frac{1}{8}:\frac{1}{6}\)
\(x=\frac{3}{4}\)
2.
Mảnh vải đó dài:
\(3.6:72\%=5\) (m)
Đáp số: 5m
3. \(Ư\left(12\right)=\left\{1;-1;2;-2;3;-3;4;-4;6;-6;12;-12\right\}\)