Question

[Bùi Xuân Lê]

9 1/4+6 2/7+7 3/5+8 2/3+2/5+1/3+5/7+3/4 =

chú ý : 4 số đầu đều là hỗn số

Answer 1

[Ngọc Nguyễn Minh]

    \(9\frac{1}{4}+6\frac{2}{7}+7\frac{3}{5}+8\frac{2}{3}+\frac{2}{5}+\frac{1}{3}+\frac{5}{7}+\frac{3}{4}\)

\(=\left(9\frac{1}{4}+\frac{3}{4}\right)+\left(6\frac{2}{7}+\frac{5}{7}\right)+\left(7\frac{3}{5}+\frac{2}{5}\right)+\left(8\frac{2}{3}+\frac{1}{3}\right)\)

\(=\left(\frac{37}{4}+\frac{3}{4}\right)+\left(\frac{44}{7}+\frac{5}{7}\right)+\left(\frac{38}{5}+\frac{2}{5}\right)+\left(\frac{26}{3}+\frac{1}{3}\right)\)

\(=\frac{40}{4}+\frac{49}{7}+\frac{40}{5}+\frac{40}{5}+\frac{27}{3}\)

\(=10+7+8+8+9\)

\(=42\)

**** nha Bùi Xuân Lê

Answer 2

[Nguyễn Đình Dũng]

không đọc chú ý hả