\(a,=\dfrac{4.5}{5.2}-\dfrac{6}{7}=\dfrac{4}{2}-\dfrac{6}{7}=2-\dfrac{6}{7}=\dfrac{2.7-6}{7}=\dfrac{14-6}{7}=\dfrac{8}{7}\\ -------\\ b,=\dfrac{3.6+7.9}{54}=\dfrac{18+63}{54}=\dfrac{81}{54}=\dfrac{3}{2}\)
a, \(\dfrac{4}{5}\times\dfrac{5}{2}-\dfrac{6}{7}\)
\(=2-\dfrac{6}{7}\)
\(=\dfrac{8}{7}\)
b, \(\dfrac{3}{9}+\dfrac{7}{6}=\dfrac{3}{2}\)
a.\(2-\dfrac{6}{7}=\dfrac{8}{7}\)
b.\(\dfrac{3}{9}+\dfrac{7}{6}=\dfrac{3}{2}\)
a) 4/5 x 5/2 - 6/7
= 2-6/7
= 8/7
b ) 3/9 + 7/6 = 3/2
Chúc bạn học tốt !
