Understanding Width
The "width" refers to the measurement of the distance from one side of an object to the other side, when the object is seen from its front or back. In other words, it is the measurement of how wide an object is.
To understand the concept of width, let's consider a rectangle. A rectangle has two pairs of equal-length sides. The longer pair is called the length and the shorter pair is called the width. So, if you have a rectangle with a length of 6 units and a width of 4 units, you can say that the width is the shorter side of the rectangle.
.◂Math Worksheets and Study Guides Second Grade. Place Value
Study Guide
Place Value 
Activity Lesson
Place Value Activity Lesson
Place Value Blocks Worksheet/Answer key
Place Value Worksheet/Answer key
Place Value Worksheet/Answer key
Place Value Vocabulary/Answer key
Place Value Vocabulary/Answer key
Place Value
Activity LessonActivity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Number and Operations (NCTM)
Understand numbers, ways of representing numbers, relationships among numbers, and number systems.
Use multiple models to develop initial understandings of place value and the base-ten number system.
Develop a sense of whole numbers and represent and use them in flexible ways, including relating, composing, and decomposing numbers.
Connect number words and numerals to the quantities they represent, using various physical models and representations.
Grade 2 Curriculum Focal Points (NCTM)
Number and Operations: Developing an understanding of the base-ten numeration system and place-value concepts
Children develop an understanding of the base-ten numeration system and place-value concepts (at least to 1000). Their understanding of base-ten numeration includes ideas of counting in units and multiples of hundreds, tens, and ones, as well as a grasp of number relationships, which they demonstrate in a variety of ways, including comparing and ordering numbers. They understand multi-digit numbers in terms of place value, recognizing that place-value notation is a shorthand for the sums of multiples of powers of 10 (e.g., 853 as 8 hundreds + 5 tens + 3 ones).