# Unit 1: Place Value

Posted by Susan Alcock on 8/15/2016

Unit 1: Place Value

The Essential Questions for this unit are:

• How do I recognize and read multi-digit numbers?
• How do I write and represent multi-digit numbers?
• How do I compare multi-digit numbers?
• How do I round multi-digit numbers?
• How can I add and subtract multi-digit numbers?

What students will be able to do by the end of the unit:

• Recognize and read numbers up to 1,000,000 in word form, standard form, and expanded form
• Write and represent numbers up to 1,000,000 in word form, standard form, and expanded form
• Use place value strategies to compare and order numbers
• Round and estimate numbers
• Fluently add and subtract numbers (with regrouping)

Key Terms:

Expanded Form - a way to write numbers by showing the value of each digit

Word Form - a way to write numbers by using words

Standard Form -a way to write numbers by using the digits 0-9 with each digit having a place value

Rounding - to replace a number with another number that tells about how many or how much

Estimate - a number close to an exact amount

Period - each group of three digits separated by commas in a multi-digit number

Compare - to describe whether numbers are equal to, less then, or greater than each other

Place Value - the value of a digit in a number, based on the location of the digit