Question

[lai minh quyen]

1 thuc hien phep tinh 

a] [3/8cong am3/4cong7/12] chia 5/6cong 1/2

Answer 1

[0o0 Nguyễn Đoàn Tuyết Vy 0o0]

a)

\(\left[\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right]:\frac{5}{6}+\frac{1}{2}\)

=\(\left[\frac{9}{24}+\frac{-18}{24}+\frac{14}{24}\right]:\frac{5}{6}+\frac{1}{2}\)

=\(\frac{5}{24}:\frac{5}{6}+\frac{1}{2}\)

=\(\frac{5}{24}.\frac{6}{5}+\frac{1}{2}\)

=\(\frac{1}{4}+\frac{1}{2}=\frac{1}{4}+\frac{2}{4}=\frac{3}{4}\)

tk ủng hộ mk nha ạ!!!!!!!!!!!!!

Answer 2

[QuocDat]

\(\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)

\(=\left(\frac{-3}{8}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)

\(=\frac{5}{24}:\frac{5}{6}+\frac{1}{2}\)

\(=\frac{1}{4}+\frac{1}{2}\)

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