Question

Помогите плиз Очень надо а)5 3/5*1 4/21= б)32*5/24= в)12/35*2/5

Answer 1

 а)5 3/5*1 4/21=28/5*25/21=28*25/5*21=20/3=6 2/3

б)32*5/24= 20/3= 6 2/3

в)12/35*2/5 = 12*2/35*5=24/175

Answer 2

$<var>5frac {3}{5}*1frac{4}{21}=frac {28}{5} *frac {25}{21}=frac {28*25}{5*21}=frac {4*7*5*5}{5*3*7}=frac {4*5}{3}=frac {20}{3}; 32*frac{5}{24}=frac {32*5}{24}=frac {4*8*5}{3*8}=frac{4*5}{3}=frac {20}{3} frac{12}{35}*frac{2}{5}=frac {12*2}{35*5}</var>=frac {24}{175}$