Unit 6 Contents

Zero

Julia wrote a number with base-ten shorthand.

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She started to write it in standard form. “Now what do I do?” she thought. “This number does not have any tens. What do I write in the tens place?”

The number zero was invented for just this purpose—to be a placeholder.

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Julia's number is 304. We show that it has no tens by writing 0 in the tens place. If we wrote only the 3 and the 4 without showing there are no tens, we would be confused. We would not know that the 3 refers to hundreds and the 4 refers to ones.

13. Write the numbers below in standard form. Use zero to hold the place when necessary.
    1. 
    2. 
    3. 
    4. 
    5. 
    6. 
    7. 
    8. 
14. Write the numbers in Questions 13A–13D in expanded form.