1+2=3 - 2+1=3, 3+2=5 - 2+3=5, 4+5=9 - 5+4=9, 3+4=7 - 4+3=7, 3+1=4  - 1+3=4, 4+2=6 - 2+4=6 , 0+7=7 - 7+0=7, 3+6=9 - 6+3=9 ,

Addition to 10: Matching Pairs

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