Question

bài 2 tính 7/15 + ( 5/6 - 1/30)

Answer 1

7/15 + 4/5 = 19/15

Answer 2

\(\dfrac{7}{15}+\left(\dfrac{5}{6}-\dfrac{1}{30}\right)\)

\(=\dfrac{7}{15}+\left(\dfrac{25}{30}-\dfrac{1}{30}\right)\)

\(=\dfrac{7}{15}+\dfrac{24}{30}\)

\(=\dfrac{7}{15}+\dfrac{12}{15}\)

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

Answer 3

\(\dfrac{7}{5}+\dfrac{24}{30}\)= \(\dfrac{42}{30}+\dfrac{24}{30}\)= \(\dfrac{66}{30}\)= \(\dfrac{11}{5}\)

Answer 4

=7/15+24/30

=38/30