A)2+{⅓-[1+(1+⅓)]}
B)3-[1-(½+¼-1)]
C)0,1+[2+(1+⅓)-3]
D)(1+½+¼)-(2-⅔-¼)
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a)2+{1/3-[1+(1+1/3)]}
=2+{1/3-[1+(4/3)]}
=2+{1/3-[7/3]}
=2+{-2}
=0
b)3-[1-(1/2+1/4-1)]
=3-[1-(-1/4)]
=3-[5/4]
=7/4
c)0,1+[2+(1+1/3)-3]
=0,1+[2+4/3-3]
=0,1+[6/3+4/3-9/3]
=0,1+1/3
=0,3/3+1/3
=1,3/3
d)(1+1/2+1/4)-(2-2/3-1/4)
=(4/4+2/4+1/4)-(24/12-8/12-3/12)
=7/4-13/12
=12/48-4/48
=8/48
=2+{1/3-[1+(4/3)]}
=2+{1/3-[7/3]}
=2+{-2}
=0
b)3-[1-(1/2+1/4-1)]
=3-[1-(-1/4)]
=3-[5/4]
=7/4
c)0,1+[2+(1+1/3)-3]
=0,1+[2+4/3-3]
=0,1+[6/3+4/3-9/3]
=0,1+1/3
=0,3/3+1/3
=1,3/3
d)(1+1/2+1/4)-(2-2/3-1/4)
=(4/4+2/4+1/4)-(24/12-8/12-3/12)
=7/4-13/12
=12/48-4/48
=8/48
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