biểu thức 1:
\(c1:\frac{3}{4}:\frac{2}{3}+\frac{1}{4}:\frac{2}{3}=\left(\frac{3}{4}+\frac{1}{4}\right):\frac{2}{3}=1:\frac{2}{3}=\frac{3}{2}\)
\(c2=\frac{3}{4}:\frac{2}{3}+\frac{1}{4}:\frac{2}{3}=\frac{9}{8}+\frac{3}{8}=\frac{3}{2}\)
biểu thức 2:
\(c1:\left(2,07+2,13\right):0,15=4,2:0,15=28\)
\(c2:\left(2,07+2,13\right):0,15=2,07:0,15+2,13:0,15=13,8+14,2=28\)
C1:\(=\frac{3}{4}x\frac{3}{2}+\frac{1}{4}x\frac{3}{2}\)
\(=\frac{9}{8}+\frac{3}{8}\)
\(=\frac{12}{8}\)
\(=\frac{3}{2}\)
C2:\(=\left(\frac{3}{4}+\frac{1}{4}\right)x\frac{3}{2}\)
\(=1x\frac{3}{2}\)
\(=\frac{3}{2}\)
\(x=\)nhân nha bn!
