Question

tính cánh thuận tiện nhất

26/15:19/45 - 7/15 : 19/45

 

Answer 1

= (26/15-7/15):19/45

=\(\dfrac{19}{15}:\dfrac{19}{45}\)

=\(\dfrac{19}{15}x\dfrac{45}{19}=\dfrac{45}{15}=3\)

Answer 2

\(\dfrac{26}{15}\) : \(\dfrac{19}{45}\) - \(\dfrac{7}{15}\) : \(\dfrac{19}{45}\)=( \(\dfrac{26}{15}\) - \(\dfrac{7}{15}\)) : \(\dfrac{19}{45}\)

                             =     \(\dfrac{19}{15}\)  :  \(\dfrac{19}{45}\)

                             =     3