Question

\(\frac{13}{21}-5\frac{13}{21}\)

Answer 1

\(\frac{13}{21}-5\frac{13}{21}=\frac{13}{21}-\left(5+\frac{13}{21}\right)=\frac{13}{21}-5-\frac{13}{21}=-5\)

Answer 2

kết quả bằng 5

trừ mỗi phân số

Answer 3

\(\frac{13}{21}-5\frac{13}{21}\\ =\frac{13}{21}-5-\frac{13}{21}\\ =\left(\frac{13}{21}-\frac{13}{21}\right)-5\)

= 0 - 5 = -5