Solve the Sequence Puzzle: Identifying My Successor Before 2000

Q: How do I remember which direction to go?

Think of a number line! Numbers get smaller as you move left (subtract) and bigger as you move right (add). To find what comes before 2000, move left by subtracting 1.

Q: What if the number was something like 1000?

The same rule applies! The number before 1000 is $ 1000 - 1 = 999 $. It doesn't matter how big the number is - just subtract 1.

Q: What's the difference between predecessor and successor?

Predecessor means the number that comes before (subtract 1). Successor means the number that comes after (add 1). This question asks for the predecessor of 2000.

Consecutive Numbers with Subtraction Operations

The number after me is 2000. What number am I?

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Step-by-step written solution

Follow each step carefully to understand the complete solution

Understand the problem

The number after me is 2000. What number am I?

Step-by-step solution

To determine the number that comes immediately before 2000, we can use the property of consecutive integers, which differ by exactly 1.

Step 1: Identify the given number, which is 2000, and recognize we need the number preceding it.
Step 2: Subtract 1 from 2000, because consecutive numbers differ by one.
Step 3: Perform the subtraction: $2000 - 1 = 1999$ .

Thus, the number that comes right before 2000 is $1999$ .

Final Answer

$1999$

Key Points to Remember

Essential concepts to master this topic

Consecutive Rule: Numbers that follow each other differ by exactly 1
Technique: Subtract 1 from 2000 to get predecessor 1999
Check: Verify that 1999 + 1 = 2000 confirms correct answer ✓

Common Mistakes

Avoid these frequent errors

Adding 1 instead of subtracting
Don't add 1 to find the predecessor = 2001 instead of 1999! This gives the number that comes AFTER, not before. Always subtract 1 to find the number that comes immediately before another number.

Practice Quiz

Test your knowledge with interactive questions

Select the predecessor of the number 2100:

FAQ

Everything you need to know about this question

How do I remember which direction to go?

Think of a number line! Numbers get smaller as you move left (subtract) and bigger as you move right (add). To find what comes before 2000, move left by subtracting 1.

What if the number was something like 1000?

The same rule applies! The number before 1000 is $1000 - 1 = 999$ . It doesn't matter how big the number is - just subtract 1.

Are there any special cases I should watch for?

Yes! Be careful with numbers like 100, 1000, or 2000. Students sometimes think the predecessor of 1000 is 900, but it's actually 999.

How can I double-check my answer?

Add 1 to your answer - you should get back to the original number. For example: $1999 + 1 = 2000$ ✓

What's the difference between predecessor and successor?

Predecessor means the number that comes before (subtract 1). Successor means the number that comes after (add 1). This question asks for the predecessor of 2000.

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