1 21-(-3)=21+3=24 2. = 3,7-(-1,3)=3,7+1,3=5 3. =2/12-(-2/12)=2/12+2/12=4/12=1/3
4. =-13-(-12)=-13+12=-1 5. =-4,5-(-2,5)=-4,5+2,5=-2 6. =-5/8-(-3/8)=-5/8+3/8=-2/8=-1/4 7. =-18-4=-22 8. =-0,25-0,75=-1 9. =-2/9-1/9=-3/9=-1/3
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1 21-(-3)=21+3=24 2. = 3,7-(-1,3)=3,7+1,3=5 3. =2/12-(-2/12)=2/12+2/12=4/12=1/3
4. =-13-(-12)=-13+12=-1 5. =-4,5-(-2,5)=-4,5+2,5=-2 6. =-5/8-(-3/8)=-5/8+3/8=-2/8=-1/4 7. =-18-4=-22 8. =-0,25-0,75=-1 9. =-2/9-1/9=-3/9=-1/3