Correcto: 44 + 83 = 127, 34 + 78 = 112, 143 + 340 = 483, 8 X 7 = 56 , 9 X 9 = 81 , 3 X 9 = 27 , 4 X 6 = 24 , 5 X 7 = 35 , 6 X 9 = 54 , 8 X 6 = 48 , Incorrecto: 85 + 56 = 143, 34 + 78 = 122, 53 + 49 =100, 8 x 7 = 54, 9 X 5 = 84, 3 X 7 =  26, 4 X 8 = 34, 5 X 7 = 45, 6 X 5 = 36, 8 X 5 = 43,

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