The product of the successor and predecessor of 999 is
999000
998000
989000
1998
Step 1: Find the successor of 999.
Successor means the next number: \(999 + 1 = 1000\).
Step 2: Find the predecessor of 999.
Predecessor means the previous number: \(999 - 1 = 998\).
Step 3: Multiply the two numbers.
We need \(1000 \times 998\).
Easy place-value method:
\(998 \times 1000\) just adds three zeros: \(998000\).
Or, using distributive property:
\(1000 \times 998 = 1000 \times (1000 - 2)\)
\(= 1000 \times 1000 - 1000 \times 2\)
\(= 1000000 - 2000\)
\(= 998000\).
Answer: \(998000\) → Option B.