1/4-1/2=1/4-2/4=-1/4
-7/12+3/8=-14/24+9/24=-5/24
(-3 1/5)-2 1/2=-3 2/10-2 5/10=-5 7/10
1 1/6-(-2 1/12)=1 1/6+2 1/12=1 2/12+2 1/12=3 3/12=3 1/4
-7/8+(-0,7)=-7/8-7/10=-35/40-28/40=-63/40=-1 23/40
1,4-(-1 3/4)=1 4/10+1 3/4=1 8/20+1 15/20=2 23/20=3 3/20
-2 1/6-(-1,6)=-2 1/6+1 6/10=-2 5/30+1 18/30=-17/30
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1/4-1/2=1/4-2/4=-1/4
-7/12+3/8=-14/24+9/24=-5/24
(-3 1/5)-2 1/2=-3 2/10-2 5/10=-5 7/10
1 1/6-(-2 1/12)=1 1/6+2 1/12=1 2/12+2 1/12=3 3/12=3 1/4
-7/8+(-0,7)=-7/8-7/10=-35/40-28/40=-63/40=-1 23/40
1,4-(-1 3/4)=1 4/10+1 3/4=1 8/20+1 15/20=2 23/20=3 3/20
-2 1/6-(-1,6)=-2 1/6+1 6/10=-2 5/30+1 18/30=-17/30