Question

a) Tinh gia tri bieu thuc:

3/5 : 4/5 + 1/2 x 2/3

b) Tim x:

5/4 nhan x = 3/8 + 1/4

Answer 1

A

\(\frac{3}{5}\div\frac{4}{5}+\frac{1}{2}\times\frac{2}{3}\)

\(=\frac{3}{4}+\frac{1}{3}\)

\(=\frac{13}{12}\)

Answer 2

B

\(\frac{5}{4}\times x=\frac{3}{8}+\frac{1}{4}\)

 \(\frac{5}{4}\times x =\frac{5}{8}\)

\(x=\frac{5}{8}\div\frac{5}{4}\)

\(x=\frac{4}{8}=\frac{1}{2}\)

Answer 3

AI TRA LOI GIUP MINK DI