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b)-10-7-(-7)-18=10-7+7-18=-10-18=-28
c)-5/9 +2/3 +5/9+5/6- 2/3=-5/9 +5/9+2/3 - 2/3+5/6=0+0+5/6=5/6
d)- 2/7+ 3/8- 1/2 +2/7 -1/4 +1/2=- 2/7+2/7- 1/2+1/2 -1/4+ 3/8=0+0-2/8+3/8=1/8
e)-1,1+2,2+3,3-5,5+6,6 =-1,1+6,6+2,2+3,3-5,5=5,5+5,5-5,5=5,5+0=5,5
f)-3,7+2,85+4,7-4,85=-3,7+4,7+2,85-4,85=1-2=-1
g)1 i 1/4 -0,5 - 3/7 - 0,25 + 1 i 1/2=1 i 1/4- 0,25 -0,5+ 1 i 1/2 - 3/7 =1+1-3/7=2-3/7=
=1 i 4/7
h)-1/8 -1/3+2,5+ 3 i 1/3 -(-0,125)=-1/8 -(-0,125) +2,5+ 3 i 1/3-1/3=-1/8+1/8+2,5+3=0+5,5=5,5
b)-10-7-(-7)-18 = -10 - 7 + 7 - 18 = -10 - 18 = -10 - 10 - 8 = -28
c)-5/9 +2/3 +5/9+5/6- 2/3 = 5/6
d)- 2/7+ 3/8- 1/2 +2/7 -1/4 +1/2 = 3/8 - 1/4 = 3/8 - 2/8 = 1/8
e)-1,1+2,2+3,3-5,5+6,6 = -1,1 - 5,5 + 6,6 + 2,2 + 3,3 = 2,2+3,3 = 5,5
f)-3,7+2,85+4,7-4,85 = -3,7 + 4,7 + 2,85 - 4,85 = 1 - 2 = -1
g)1 i 1/4 -0,5 - 3/7 - 0,25 + 1 i 1/2 = 5/4 - 2/4 - 1/4 + 6/4 - 3/7 = 8/4 - 3/7 = 2 - 3/7 = 1 4/7
h)-1/8 -1/3+2,5+ 3 i 1/3 -(-0,125) = -1/8 - 1/3 + 25/10 + 10/3 + 1/8 = 25/10 + 9/3 = 2,5 + 3 = 5,5