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kam-jam
adding and subtraction
8 cards·by kam
1/7 + 4/14=
3/7
1/9 + 5/9=
2/3
3/6 + 3/6=
1/2
3/7 + 4/7 - 1/1 + 1/2=
1/2
1/6 + 2/6 + 2/6 - 4/6=
1/6
13/26 + 12/26 - 24/26=
1/26
1/3 + 4/6=
1/2
1/7 + 7/49 - 13/98=
1/98