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a) -0.5
b) 0,5
c) 1,5
d) 2,409
e -1
2.
a) 0
b) -17
c) -0,95
a)=[-1,5:(-0,5):(-0,1)]:(-60)=(-30):(-60)=½
b)=-19/4 : 19/9 * (-2/9) = -19/4 * 9/19 * (-2/9) = -9/4 * (-2/9) =½
c)=(-2,5 + ¼) : (-1,5)= -2,25 : (-1,5)= 1,5
d)=0,9+2,4=3,3
e)=144:(10-4:2):(-18)=144:(10-2):(-18)=144:8:(-18)=18:(-18)=-1
2.
a)=-150+22*(-10)-(-370)=-150-220+370=0
b)=-15-0,6+4=-11,6
c)=-(-14/5)*(-3/7)-(-18/5)*(-2/9)-49/10*(-3/14)=1,2-0,8+1,05=1,45