Question

Tính nhanh 

\(\frac{5}{11}+3\frac{8}{21}+\frac{6}{11}-\frac{8}{21}\)

Answer 1

\(\frac{5}{11}+3\frac{8}{21}+\frac{6}{11}-\frac{8}{21}\)

\(=\frac{5}{11}+\frac{71}{21}+\frac{6}{11}-\frac{8}{21}\)

\(=\left(\frac{5}{11}+\frac{6}{11}\right)+\left(\frac{71}{21}-\frac{8}{21}\right)\)

\(=1+3\)

\(=4\)

Đúng lun, Mn tk mk nha!

Answer 2

\(\frac{5}{11}+3\frac{8}{21}+\frac{6}{11}-\frac{8}{21}\)

=\(\frac{5}{11}+\frac{71}{21}+\frac{6}{11}-\frac{8}{21}\)

=\(\left(\frac{5}{11}+\frac{6}{11}\right)+\left(\frac{71}{21}-\frac{8}{21}\right)\)

=\(1+3\)

=

Answer 3

mik quên chưa ghi đáp án, xin lỗi nha

\(\frac{5}{11}+3\frac{8}{21}+\frac{6}{11}-\frac{8}{21}\)

=\(\frac{5}{11}+\frac{71}{21}+\frac{6}{11}-\frac{8}{21}\)

=\(\left(\frac{5}{11}+\frac{6}{11}\right)+\left(\frac{71}{21}-\frac{8}{21}\right)\)

=\(1+3\)

=\(4\)