Arkansas Curriculum Frameworks
AR.Math.Content.5.NBT. Number and Operations in Base Ten
AR.Math.Content.5.NBT.A. Understand the place value system.
AR.Math.Content.5.NBT.A.1. Recognize 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.