Question

Tính:

\(\dfrac{7}{3}\)+\(\dfrac{1}{2}\)-\(\dfrac{-3}{70}\)         \(\dfrac{5}{12}\)-\(\dfrac{3}{-16}\)+\(\dfrac{3}{4}\)

Answer 1

a: =7/3+1/2+3/70

=490/210+105/210+9/210

=604/210=302/105

b: =5/12+3/16+3/4

=20/48+9/48+36/48

=65/48

Answer 2

\(\dfrac{7}{3}+\dfrac{1}{2}-\dfrac{-3}{70}.\\ =\dfrac{7}{3}+\dfrac{1}{2}+\dfrac{3}{70}.\\ =\dfrac{17}{6}+\dfrac{3}{70}=\dfrac{302}{105}.\\ \dfrac{5}{12}-\dfrac{3}{-16}+\dfrac{3}{4}.\\ =\dfrac{5}{12}+\dfrac{3}{16}+\dfrac{3}{4}.\\ =\dfrac{29}{48}+\dfrac{3}{4}=\dfrac{65}{48}.\)