А) 3 : 1 1/2 + 5 1/3 :1/5=
= 3 * 2/3 + 16/3 * 5/1 =
= 2+ 80/3 = 2+ 26 2/3 = 28 2/3
б) ( 10 2/3 - 5 1/3) : 3 1/3 =
= 5 1/3 : 3 1/3 =16/3 :10/3=
= 16/3 * 3/10 = 8/5 = 1 3/5
в) 4 1/2 * 5 1/3 : 10 2/3 =
= 9/2 * 16/3 * 3/32 =
= ( 9*16*3) / (2*3*32)=
=( 9 *1*1 ) / (2*1*2) = 9/4 = 2 1/4