correcto: 6 x 7 = 42, 10 x 10000 = 100000, 34 x 54 = 1836, 99 + 99 = 198, 127 + 187 = 314, 180 + 180 =360, 50: 5 = 10, 75 : 5 = 15, 180: 5 = 36, 22 + 6 =28, Incorrect: 6 x 7 = 65, 10 x 10000=1000000, 34 x 54 = 1835, 99 + 99 = 189, 127 + 187 = 315, 980 x 5499 = 5489020, 7 x 4 = 10, 64 + 9= 0 , 76 + 2 = 5, 89 +78 = 988,

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