This document discusses renaming and expanding numbers. It explains how numbers like 80, 400, and 2000 can be written as groups of ones, tens, hundreds, and thousands. Numbers can be renamed, such as 43 tens being written as 430 or 15 hundreds being 1,500. Numbers can also be written in expanded form, such as 807 equaling 800 + 7 or 905 equaling 900 + 20 + 5. Examples are provided to demonstrate renaming 7 tens as 70, 15 hundreds as 150, and 200 + 70 + 4 as 274.

1. Renaming
Numbers

2. • In Working with numbers, we can also rename
them. Study the numbers below and see how
they are written.
80 400 2000
80 ones
8 tens
400 ones
40 tens
4 hundreds
2000 ones
200 tens
20 hundreds
2 thousands

3. Numbers can also be
written in expanded
form
56= 50 + 6
237 = 200 + 30 + 7
3,415 = 3000 + 400 + 10 + 5

4. Try It
• A. 7 tens _______________
• B. 15 hundreds _____________
• C. 200 + 70 + 4 _____________

5. Answer
• A. 7 tens 70
• B. 15 hundreds 150
• C. 200 + 70 + 4 274

6. Remaining a number means giving the number a
different name.
• Examples: 43 tens = 430
15 hundreds = 1,500
Numbers can be written in expanded form.
• Examples: 807 = 800 + 7
905 = 900 + 20 + 5