56-20 - 46, 98-50 - 48, 42-10 - 32, 77-20 - 57, 68-60 - 8, 92-70 - 22, 51-20 - 31, 95-80 - 15, 66-20 - 46, 73-40 - 33, 47-30 - 17, 86-60 - 26, 72-50 - 22, 38+30 - 68, 25+70 - 95, 62+10 - 72, 73+20 - 93, 21+50 - 71, 44+30 - 74, 36+50 - 86, 25+40 - 65, 74+10 - 84,

Sumar y restar decenas fácil

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