Question

thực hiện phép tính

M = 9 phần 40 - 11 phần 60 + 13 phần 84 - 15 phần 112

Answer 1

M= \(\dfrac{9}{40}-\dfrac{11}{60}+\dfrac{13}{84}-\dfrac{15}{112}\)

= (\(\dfrac{9}{40}-\dfrac{11}{60}\)) + (\(\dfrac{13}{84}-\dfrac{15}{112}\))

= (\(\dfrac{27}{120}-\dfrac{22}{120}\)) + (\(\dfrac{52}{336}-\dfrac{45}{336}\))

= \(\dfrac{1}{24}+\dfrac{1}{48}\)

= \(\dfrac{2}{48}+\dfrac{1}{48}\)

=\(\dfrac{3}{48}=\dfrac{1}{16}\)