Find the Numbers Before and After 47990: Sequence Completion

Number Sequences with Consecutive Integers

Complete the previous and following numbers:

,47990, \Box,47990,\Box

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Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Complete the previous and following numbers:

,47990, \Box,47990,\Box

2

Step-by-step solution

To solve this problem of identifying the predecessor and successor of the given number 47990 47990 , follow these steps:

  • Step 1: Find the predecessor of 47990 47990 by performing the calculation 479901 47990 - 1 .
  • Step 2: Compute 47989 47989 as the result.
  • Step 3: Find the successor of 47990 47990 by performing the calculation 47990+1 47990 + 1 .
  • Step 4: Compute 47991 47991 as the result.

Consequently, the predecessor is 47899 47899 and the successor is 47991 47991 . Hence, the correct sequence is 47899,47990,47991 47899, 47990, 47991 .

Therefore, the correct choice from the given options is Choice 2: 47899,47991 47899,47991 .

3

Final Answer

47899,47991 47899,47991

Key Points to Remember

Essential concepts to master this topic
  • Rule: Predecessor = original number minus 1, successor = plus 1
  • Technique: Calculate 479901=47989 47990 - 1 = 47989 and 47990+1=47991 47990 + 1 = 47991
  • Check: Verify sequence increases by 1: 47989, 47990, 47991 ✓

Common Mistakes

Avoid these frequent errors
  • Confusing predecessor calculation
    Don't subtract 1 from the wrong digit or change multiple digits = getting 46990 instead of 47989! This happens when you don't understand place value properly. Always subtract 1 from the entire number using standard subtraction.

Practice Quiz

Test your knowledge with interactive questions

What number follows 70,099?

FAQ

Everything you need to know about this question

What's the difference between predecessor and successor?

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The predecessor comes before a number (subtract 1), while the successor comes after a number (add 1). Think of it like counting: 47989 → 47990 → 47991.

Why is 47989 the predecessor and not 46990?

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Because predecessor means the number that comes immediately before. When you subtract 1 from 47990, you get 47989, not 46990. Always subtract exactly 1!

Can I use this method for any number?

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Yes! Every whole number has a predecessor (number - 1) and successor (number + 1). This works for small numbers like 5 and large numbers like 999,999.

What if the number ends in 0?

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No problem! When subtracting 1 from numbers ending in 0, you borrow from the next place value. For example: 479901=47989 47990 - 1 = 47989 .

How do I check if my sequence is correct?

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Make sure each number is exactly 1 more than the previous number. Count: first number + 1 = middle number, middle number + 1 = last number ✓

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