Correct: 10+10=20, 11+9=20, 8+12=20, 7+13=20, 14+6=20, 5+15=20, 16+4=20, 3+17=20, 2+18=20, 19+1=20, 0+20=20, 9+9=18, 8+9=17, 7+9=16, 9+6=15, 5+9=14, 9+4=13, 3+9=12, 9+2=11, 1+9=10, 9+0=9, 8+7=15, 6+8=14, 8+5=13, 4+8=12, 3+8=11, 8+2=10, 1+8=9, 8+0=8, 8+8=16, Incorrect: 10+10=10, 8+11=20, 12+7=20, 13+6=20, 4+14=20, 3+15=20, 16+2=20, 1+17=20, 18+1=20, 0+19=20, 20+0=2, 9+9=19, 9+8=19, 7+9=17, 9+6=16, 5+9=15, 9+4=14, 9+3=13, 9+2=12, 1+9=19, 9+0=0, 8+7=17, 6+8=16, 8+5=15, 4+8=14, 3+8=13, 8+2=12, 8+1=10, 0+8=0, 8+8=18,

Addition within 20 Part 2

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