Subtraction

Subtraction is the mathematical operation of taking away one number from another. It is the opposite of addition. When you subtract, you are finding the difference between two numbers.

For example, if you have 5 apples and you eat 3 of them, you can use subtraction to find out how many apples you have left. The equation would be 5 - 3 = 2, so you have 2 apples left.

Subtraction is typically represented using the minus sign (-). The number that is being subtracted is called the subtrahend, and the number it is being subtracted from is called the minuend. The result of a subtraction is called the difference.

When performing subtraction, it's important to remember that the order of the numbers matters. For example, 5 - 3 is not the same as 3 - 5. The result will be different depending on the order of the numbers.

Subtraction can be represented visually using number lines, counting backwards, or using objects to physically take away from a group. It is an important skill in mathematics and is used in various real-life situations.

◂Math Worksheets and Study Guides Third Grade. Commutative Property

The resources above cover the following skills:

Number and Operations (NCTM)

Understand meanings of operations and how they relate to one another.

Understand and use properties of operations, such as the distributivity of multiplication over addition.

Compute fluently and make reasonable estimates.

Develop fluency in adding, subtracting, multiplying, and dividing whole numbers.

Select appropriate methods and tools for computing with whole numbers from among mental computation, estimation, calculators, and paper and pencil according to the context and nature of the computation and use the selected method or tools.

Algebra (NCTM)

Represent and analyze mathematical situations and structures using algebraic symbols.

Identify such properties as commutativity, associativity, and distributivity and use them to compute with whole numbers.

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 and Algebra: Developing understandings of multiplication and division and strategies for basic multiplication facts and related division facts

Students understand the meanings of multiplication and division of whole numbers through the use of representations (e.g., equal-sized groups, arrays, area models, and equal 'jumps' on number lines for multiplication, and successive subtraction, partitioning, and sharing for division). They use properties of addition and multiplication (e.g., commutativity, associativity, and the distributive property) to multiply whole numbers and apply increasingly sophisticated strategies based on these properties to solve multiplication and division problems involving basic facts. By comparing a variety of solution strategies, students relate multiplication and division as inverse operations.

Subtraction

[Subtraction] Related Worksheets and Study Guides:

◂Math Worksheets and Study Guides Third Grade. Commutative Property

The resources above cover the following skills: