\(\dfrac{3}{7}+\dfrac{5}{7}+1+3+4+\dfrac{2}{7}+\dfrac{4}{7}+2=\left(\dfrac{3}{7}+\dfrac{5}{7}+\dfrac{2}{7}+\dfrac{4}{7}\right)+\left(1+3+4+2\right)=2+10=12\)
Đúng 1
Bình luận (1)
3/7+5/7+1+3+5+2/7+4/7+2
=(3/7+5/7+2/7+4/7)+(1+3+5+2)
=2+11
=13
Đúng 1
Bình luận (2)
