Odpowiedź:
5a)5×(-3)+2×2/(-3)= -15+4/(-3)= -11/(-3)=11/3=3 2/3
6a) 1 - 1/2 -2/3 /(-1/4) + 1 - 2/3 - (-1/4)/ 1/2 + 1 - (-1/4)- 1/2 / 2/3= 6/6 - 3/6 - 4/6 /(-1/4) + 12/12 - 8/12 - (- 3/12)/ 1/2+ 4/4-( -1/4) -2/4 /2/3=( -1/6) / (-1/4) + 7/12 /1/2 + 3/4 / 2/3= (-1/6)×(-4) + 7/12×2 + 3/4× 3/2= 2/3+7/6+9/8=16/24+28//24+27/24=71/24=2 23/24
7a)8a^5/ 2a^4=4a