№667
84:2=42
42+4=46
42-4=38
46-38= 8 (38 меньше на 8)
46+38=84
№669 хз
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№667
84:2=42
42+4=46
42-4=38
46-38= 8 (38 меньше на 8)
46+38=84
№669 хз