Question

$2 frac{2}{5} * frac{3}{8} : frac{9}{10} +2 frac{1}{7} :4 frac{1}{2} *5 frac{1}{4} =?$

Answer 1

1) 2 ( 2/5 ) * ( 3/8 ) : ( 9/10 ) = ( 12/5 ) * ( 3/8 ) * ( 10/9 ) = 360/360 = 1 
2) 2 ( 1/7 ) : 4 ( 1/2 ) * 5 ( 1/4 ) = (15/7 ) * (  2/9  ) * ( 21/4 ) = 630/252 = 2,5
3) 1 + 2,5 = 3,5 
ОТВЕТ 3,5

Answer 2

спс

Answer 3

1)12/5*3/8=9/10
2)9/10*10/9=1
3)15/7*2/9=10/21
4)10/21*21/4=5/2
5)1+5/2=7/2=3,5
Ответ:3,5