Find the answers to the following questions based on the given information. (a) $17 \times 23$ = 391 (b) $17 \times 24$ = ___ (c) $17 \times 22$ = ___ (d) $16 \times 23$ = ___ (e) $8 \times 9$ = 72 (f) $18 \times 9$ = ___ (g) $28 \times 9$ = ___ (h) $108 \times 9$ = ___ (i) $18 \times 23$ = ___. To find $17 \times 24$, how much is to be added to $17 \times 23$—17 or 23? To find $18 \times 23$, how much is to be added to $17 \times 23$—17 or 23?