Question

1) ( 7 7/12 - 15 ) - ( 18 1/2 - 13 7/15 )
2) ( 5 + 3 5/8 ) - ( 7 3/4 - 23 ) 

Answer 1

$( 7 frac{7}{12} - 15 ) - ( 18 frac{1}{2} - 13 frac{7}{15} )=7 frac{35}{60} - 15 - 18 frac{30}{60}+ 13 frac{28}{60} = \ =-13+ frac{33}{60} =-12 frac{27}{60} =-12,45$

$( 5 + 3 frac{5}{8} ) - ( 7 frac{3}{4} - 23 ) = 5 + 3 frac{5}{8} - 7 frac{6}{8}+ 23 = \ =24 - frac{1}{8} =23 frac{7}{8} =23,875$