Find the Predecessor: What Number Comes Before 70,010?

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

The predecessor comes before a number (subtract 1), while the successor comes after a number (add 1). Think of it like a number line where you move left for predecessor and right for successor!

Q: Why can't the answer be 71,000?

71,000 is much larger than 70,010! The predecessor must be exactly one less than the given number. 71,000 - 70,010 = 990, which is way too big a difference.

Q: What if the problem asks 'who am I' instead of asking directly?

When a problem says 'My following number is 70,010, who am I?' it's asking for the predecessor. The word 'following' means the number that comes next, so you need to find what comes before it.

Q: Do I always just subtract 1 for any predecessor?

Yes! No matter how big or small the number, the predecessor is always found by subtracting 1. This works for whole numbers, whether they're 5, 500, or 50,000!

Number Predecessors with Five-Digit Numbers

My following number is 70,010

Who am I?

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Step-by-step written solution

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Understand the problem

My following number is 70,010

Who am I?

Step-by-step solution

To solve this problem, let's proceed as follows:

Step 1: Identify the given number, which is $70,010$ .
Step 2: Use subtraction to find the predecessor. The formula to use here is: Predecessor = Given Number - 1.
Step 3: Perform the calculation: $70,010 - 1 = 70,009$ .

Therefore, the number immediately preceding $70,010$ is $70,009$ .

Given the answer choices, the correct choice is:
Choice 4: $70,009$ .

Final Answer

$70,009$

Key Points to Remember

Essential concepts to master this topic

Rule: A predecessor is the number that comes immediately before another
Technique: Subtract 1 from the given number: 70,010 - 1 = 70,009
Check: Verify that 70,009 + 1 equals the original number 70,010 ✓

Common Mistakes

Avoid these frequent errors

Adding 1 instead of subtracting
Don't add 1 to find the predecessor = 70,011 instead of 70,009! This gives you the successor (next number) rather than the predecessor. Always subtract 1 to find the number that comes before.

Practice Quiz

Test your knowledge with interactive questions

What number comes before 31,000?

FAQ

Everything you need to know about this question

What's the difference between predecessor and successor?

The predecessor comes before a number (subtract 1), while the successor comes after a number (add 1). Think of it like a number line where you move left for predecessor and right for successor!

Why can't the answer be 71,000?

71,000 is much larger than 70,010! The predecessor must be exactly one less than the given number. 71,000 - 70,010 = 990, which is way too big a difference.

What if the problem asks 'who am I' instead of asking directly?

When a problem says 'My following number is 70,010, who am I?' it's asking for the predecessor. The word 'following' means the number that comes next, so you need to find what comes before it.

Do I always just subtract 1 for any predecessor?

Yes! No matter how big or small the number, the predecessor is always found by subtracting 1. This works for whole numbers, whether they're 5, 500, or 50,000!

How do I check my answer is correct?

Add 1 to your answer and see if you get the original number back. For example: $70,009 + 1 = 70,010$ ✓ This confirms 70,009 is correct!

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