In mathematics, size refers to the measurement or extent of an object or shape in terms of its dimensions, such as length, width, or height. Size can also refer to the magnitude or quantity of something, such as the number of items in a set.

Size can be measured using various units of measurement, such as inches, centimeters, feet, meters, or other appropriate units depending on the context. In geometry, size can be determined by measuring the length of a line, the area of a shape, or the volume of a solid object.

When comparing sizes, mathematical concepts such as greater than (>), less than (<), and equal to (=) are used to indicate the relationship between different sizes. For example, when comparing two numbers, if one number is larger than the other, it is represented using the "greater than" symbol (>).

Understanding size is important in various real-world applications, such as measuring ingredients in cooking, determining the dimensions of objects in construction and engineering, or comparing quantities in everyday tasks.

Overall, size is a fundamental concept in mathematics that plays a crucial role in understanding and describing the physical and numerical attributes of objects and quantities.

Study GuideComparing Fractions Activity LessonFraction Circles Activity LessonParty Plan Worksheet/Answer key

Comparing Fractions Worksheet/Answer key

Comparing Fractions Worksheet/Answer key

Comparing Fractions Worksheet/Answer keyComparing Fractions Worksheet/Answer keyOrdering Fractions Vocabulary/Answer keyComparing Fractions

Number and Operations (NCTM)

Understand numbers, ways of representing numbers, relationships among numbers, and number systems.

Develop understanding of fractions as parts of unit wholes, as parts of a collection, as locations on number lines, and as divisions of whole numbers.

Use models, benchmarks, and equivalent forms to judge the size of fractions.

Algebra (NCTM)

Use mathematical models to represent and understand quantitative relationships.

Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.

Grade 3 Curriculum Focal Points (NCTM)

Number and Operations: Developing an understanding of fractions and fraction equivalence

Students develop an understanding of the meanings and uses of fractions to represent parts of a whole, parts of a set, or points or distances on a number line. They understand that the size of a fractional part is relative to the size of the whole, and they use fractions to represent numbers that are equal to, less than, or greater than 1. They solve problems that involve comparing and ordering fractions by using models, benchmark fractions, or common numerators or denominators. They understand and use models, including the number line, to identify equivalent fractions.