5 - 20-__=15, 3 - 20-__=17, 9 - 20-__=11, 2 - 20-__=18, 10 - 20-__=10, 6 - 20-__=14, 8 - 20-__=12, 7 - 20-__=13, 0 - 20-__=20, 4 - 20-__=16, 1 - 20-__=19,

Hiányos kivonás 20-ból

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