Question

(-7 1/4+5 2/3)-(-3,6-5,4)

Answer 1

$(-7 frac{1}{4}+5 frac{2}{3})-(-3,6-5,4)=(-frac{29}{4}+frac{17}{3})-(- frac{36}{10} - frac{54}{10} )= \ \ =(-frac{29}{4}+frac{17}{3})-(- frac{18}{5} - frac{27}{5} )=frac{-29*3+17*4}{12}-frac{-18-27}{5}= \ \ =frac{-19}{12}-frac{-45}{5}= frac{-19*5+45*12}{60} = frac{445}{60}= frac{89}{12} =7 frac{5}{12}$

Answer 2

(- 7 1/4 + 5 2/3) - (- 3,6 - 5,4) = - 7 1/4 + 5 2/3 + 3,6 + 5,4 = 7 5/12

1) 5 2/3 - 7 1/4 = (5 - 7) + (2/3 - 1/4) = - 2 + (8/12 - 3/12) = - 2 + 5/12 = - 1 7/12

2) 3,6 + 5,4 = 9

3) 9 - 1 7/12 = 8 12/12 - 1 7/12 = 7 5/12