Odpowiedź:
a) 2 - 4×(-5)= 2+20=22
b) 1 ½ × ½ + ¾ = 3/2 × ½ +¾= ¾+¾=1 ½
c) (-4)³ + (-4)² + (-4) = -64 + 16 -4 = -52
d) 5×(-½)-2×(-1¼)=-2½+5=2½
e) ¼×(-½-½)=¼×1=¼
