Correct: 5+5=, 6+4=, 7+3=, 8+2=, 9+1=, 1+9=, 2+8=, 3+7=, 4+6=, 5 +5=, 4 +6=, 3 +7=, 2 +8=, 1 +9=, 9 +1=, 8 +2=, 7 +3=, 6 +4=, Incorrect: 5+4=, 3+8=, 2+9=, 4+4=, 5+7=, 2+4=, 9+3=, 3+4=, 5+8=,

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