Question

Решите пж (5 3/10-3 4/5*13/38)*5/84+2 1/12*4/15 по действиям!
Дам 10 балов

Answer 1

$1. 3 frac{4}{5}* frac{13}{38}= frac{19*13}{5*38}= frac{1*13}{5*2}= frac{13}{10}$

$2. 5 frac{3}{10}- frac{13}{10}=4 frac{13}{10}- frac{13}{10}=4$

$3. 4* frac{5}{84}= frac{4*5}{1*84}= frac{1*5}{1*21}= frac{5}{21}$

$4. 2 frac{1}{12} * frac{4}{15}= frac{25*4}{12*15}= frac{5*1}{3*3}= frac{5}{9}$

$5. frac{5}{21}+ frac{5}{9}= frac{15+35}{63} = frac{50}{63}$