Question

tính nhanh 3/5 . 13/46 - 1/10 . 16/23

Answer 1

\(\dfrac{3}{5}.\dfrac{13}{46}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=3.\dfrac{1}{5}.\dfrac{1}{2}.\dfrac{13}{23}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=3.\dfrac{1}{10}.\dfrac{13}{23}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=\dfrac{1}{10}.\left(3.\dfrac{13}{23}-\dfrac{16}{23}\right)\)

\(=\dfrac{1}{10}.1=\dfrac{1}{10}\)

Chúc bạn học tốt!!!

Answer 2

3/5 . 13/46 - 1/10 . 16/23 = 3 . 1/5 . 1/2 . 13/23 - 1/10 . 16/23

= 1/10 . 39/23 - 1/10 . 16/23

= 1/10 . (39/23 - 16/23)

= 1/10

Xong rồi đó ^ ^!