Question

There are 18,076 books in our public library. How should this number be written in expanded form? A) 10,000 + 8,000 + 70 + 6 B) 10,000 + 8000 + 700 + 6 C) 18,000 + 700 + 60+ 0 D) 18,000 + 70 + 60 + 0

Answer 1

A) 10,000 + 8,000 + 70 + 6

Answer 2

A) 10,000 + 8,000 + 70 + 6

Explanation:

Write one digit at a time, with the others shown as zero. The sum of those numbers is the expanded form.

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There are other ways to write a number in expanded form. One I like uses exponents to show the place value.

1×10⁴ +8×10³ +0×10² +7×10¹ +6×10⁰

Understanding this form can help you write the number in scientific notation.