Colorado Common Core Standards
CO.5.1. Number Sense, Properties, and Operations
5.1.1. The decimal number system describes place value patterns and relationships that are repeated in large and small numbers and forms the foundation for efficient algorithms. Students can:
5.1.1.a. Explain that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents in the place to its left. (CCSS: 5.NBT.1)
5.1.1.a.iii. Use whole-number exponents to denote powers of 10. (CCSS: 5.NBT.2)