Odpowiedź:
( 4,2 - 1 3/5 ) : 1 1/4 × 3,2 =
= ( 4 2/10 - 1 6/10) : 5/4 × 32/10=
= ( 3 12/10 - 1 6/10 ) : 8/2 =
= 2 6/10 : 8/2 =
= 26/10 × 2/8 =
= 13/20
