Odpowiedź:
a) -5+(-7)-(-15)=-12-(-15)=-27
b) =-1,2-(2,5-10)=-1,2-(-7,5)=-1,2+7,5=6,3
c)=-2/3*-1,8=-2/3*-1 8/10=-2/3*-18/10=6/5=1 1/5
d)=-3*-3*7:-9=9*7:-9=63:-9=-7
e)=-2 8/11*(37/3-72/10)=-2 8/11*(370/30-216/30)=-2 8/11*154/30=-30/11*154/30=-154/11=-14
f)-12,4+(-3+7,2)*-2=-12,4+4,2*-2=-12,4+(-8,4)=-20,8
g)=(-11+5)*(7-8,75)=-6*(-1,75)=10,5
h)=(4-(12-8-1)-2)=(4-3-2)=-1
