Odpowiedź:
zadanie 13
a) 1 5/8 -(2,75-1 4/5) = 13/8-( 11/4 - 9/5)= 13/8 - 19/20= 27/40
b) 1,35-(2 3/4- 3 1/8) - 7 1/2 -(6 3/5+ 2,3)= 27/20 - (11/4 - 25/8) -15/2 -(33/5+23/10)= 27/20-(-3/8)- 15/2 - 33/5+ 23/10) = 27/20+ 3/8 - 15/2 - 89/10= -14 27/40
zadanie 14
a) -5/6
b) -3 1/4
