Arithmetic

Arithmetic is the branch of mathematics that deals with the study of numbers and the basic operations performed on them. These operations include addition, subtraction, multiplication, and division.

Addition

Addition is the process of combining two or more numbers to find their total. For example, adding 3 and 4 gives the sum 7, which can be represented as 3 + 4 = 7.

Subtraction

Subtraction is the process of taking one number away from another. For example, subtracting 4 from 7 gives the difference 3, which can be represented as 7 - 4 = 3.

Multiplication is the process of repeated addition. It is used to find the total when a number is added to itself multiple times. For example, multiplying 3 by 4 gives the product 12, which can be represented as 3 * 4 = 12.

Division

Division is the process of splitting a number into equal parts. It is used to find out how many times one number is contained in another. For example, dividing 12 by 3 gives the quotient 4, which can be represented as 12 ÷ 3 = 4.

Order of Operations

When performing arithmetic operations involving multiple steps, it is important to follow the order of operations: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

◂Math Worksheets and Study Guides Third Grade. Units of Measure

The resources above cover the following skills:

Measurement (NCTM)

Understand measurable attributes of objects and the units, systems, and processes of measurement.

Understand such attributes as length, area, weight, volume, and size of angle and select the appropriate type of unit for measuring each attribute.

Understand the need for measuring with standard units and become familiar with standard units in the customary and metric systems.

Understand that measurements are approximations and how differences in units affect precision.

Apply appropriate techniques, tools, and formulas to determine measurements.

Select and apply appropriate standard units and tools to measure length, area, volume, weight, time, temperature, and the size of angles.

Connections to the Grade 3 Focal Points (NCTM)

Measurement: Students in grade 3 strengthen their understanding of fractions as they confront problems in linear measurement that call for more precision than the whole unit allowed them in their work in grade 2. They develop their facility in measuring with fractional parts of linear units. Students develop measurement concepts and skills through experiences in analyzing attributes and properties of two-dimensional objects. They form an understanding of perimeter as a measurable attribute and select appropriate units, strategies, and tools to solve problems involving perimeter.

Arithmetic

Addition

Subtraction

Multiplication

Division

Order of Operations

[Arithmetic] Related Worksheets and Study Guides:

◂Math Worksheets and Study Guides Third Grade. Units of Measure

The resources above cover the following skills: