Question

5 1/4 × 1 9/10-5 1/4 × 4 9/10

Answer 1

$5 frac{1}{4} *1 frac{9}{10} -5 frac{1}{4} *4 frac{9}{10} =5 frac{1}{4} *(1 frac{9}{10} -4 frac{9}{10} )= frac{21}{4} *( frac{19}{10} - frac{49}{10} )= frac{21}{4} *(- frac{30}{10} )=$
$- frac{21}{4} *3=- frac{63}{4} =-15 frac{3}{4} =-15,75$