5,67-4,94+4,94-5,67=(5,67-5,67)+(-4,94+4,94)=0+0=0
5,8+3,75-5,8+4,25=(5,8-5,8)+(3,75+4,25)=0+8=8
-7,9+5,21+11,9=-7,9+(5,21+11,9)=-7,9+17,11=9,21
4,72-6,43-5,57-4,22=4,72+(-6,43-5,57-4,22)=4,72-16,22=-11,5
8 11/18-4,2-3 5/18-2,8=(8 11/18-3 5/18)+(-4,2-2,8)=5 6/18-7=5 1/3-7=5 1/3-6 3/3=
=-1 2/3
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Answers & Comments
5,67-4,94+4,94-5,67=(5,67-5,67)+(-4,94+4,94)=0+0=0
5,8+3,75-5,8+4,25=(5,8-5,8)+(3,75+4,25)=0+8=8
-7,9+5,21+11,9=-7,9+(5,21+11,9)=-7,9+17,11=9,21
4,72-6,43-5,57-4,22=4,72+(-6,43-5,57-4,22)=4,72-16,22=-11,5
8 11/18-4,2-3 5/18-2,8=(8 11/18-3 5/18)+(-4,2-2,8)=5 6/18-7=5 1/3-7=5 1/3-6 3/3=
=-1 2/3