SHORT ANSWER FOR EXAM look at unit’s digit 7 + 4 = 2 but in decimal 7 + 4 = 11 so base of this number system is 11 – 2 = 9 (WHY and HOW ?? → see below explanation) since now we know base is 9 so→ adding $342 + 562 = (1014)_{9}$ HOW TO ADD IN ANY BASE → Explanation → CORRECTION → as long as two (1 digited) numbers are added, result will always be AT MAX 1x {x is a digit in that number system}
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