Question

Как решить пример: (5.1/2+2.3/5)* 5/9=

Answer 1

(5.1/2+2.3/5)* 5/9=4.1/2
$5 frac{1}{2}+2 frac{3}{5}= frac{11}{2}+ frac{13}{5}= frac{55+26}{10}= frac{81}{10}$
$frac{81}{10}* frac{5}{9}= frac{9*1}{2*1}= frac{9}{2}=4 frac{1}{2}$