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pencil Addition 1-Digit

8+7=5+4=6+10=
8+0=10+10=6+2=
0+9=4+1=2+7=
8+1=4+3=4+1=
4+9=5+5=4+0=
4+2=8+1=3+5=
0+10=3+8=3+1=
2+1=7+3=6+8=
2+3=6+10=0+8=
2+6=8+6=9+1=