Subtraction is the process of taking away one number from another. Subtraction facts are the basic equations that represent this process. These facts help us understand the relationship between numbers and how they can be combined or separated.

In first grade, students typically start by learning basic subtraction facts within 10. These facts involve numbers from 0 to 10 and help build a foundation for understanding subtraction. For example:

- 5 - 3 = 2
- 8 - 2 = 6
- 4 - 4 = 0

There are several strategies that can help students learn subtraction facts more easily:

- Using manipulatives: Physical objects like counters or blocks can help students visualize the process of taking away from a larger group.
- Number line: Drawing a number line can help students see the distance between two numbers and how much needs to be subtracted.
- Counting back: Starting from the larger number and counting back the amount being subtracted can help reinforce the concept of subtraction.

Repetitive practice and exposure to subtraction facts can help students achieve mastery. Flashcards, games, and worksheets are common tools used to reinforce these facts and help students become fluent in subtraction.

Understanding subtraction facts is an important building block for developing strong math skills. As students progress, they will use these foundational facts to solve more complex subtraction problems and gain a deeper understanding of mathematics.

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Study GuideSubtraction Facts Worksheet/Answer key

Subtraction Facts Worksheet/Answer key

Subtraction Facts Worksheet/Answer key

Subtraction Facts Worksheet/Answer keySubtraction Facts Worksheet/Answer keyAddition and Subtraction Vocabulary/Answer keySubtraction Facts

Number and Operations (NCTM)

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

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.

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

Understand various meanings of addition and subtraction of whole numbers and the relationship between the two operations.

Understand the effects of adding and subtracting whole numbers.

Compute fluently and make reasonable estimates.

Develop and use strategies for whole-number computations, with a focus on addition and subtraction.

Develop fluency with basic number combinations for addition and subtraction.

Algebra (NCTM)

Represent and analyze mathematical situations and structures using algebraic symbols.

Use concrete, pictorial, and verbal representations to develop an understanding of invented and conventional symbolic notations.

Use mathematical models to represent and understand quantitative relationships.

Model situations that involve the addition and subtraction of whole numbers, using objects, pictures, and symbols.

Grade 1 Curriculum Focal Points (NCTM)

Number and Operations and Algebra: Developing understandings of addition and subtraction and strategies for basic addition facts and related subtraction facts

Children develop strategies for adding and subtracting whole numbers on the basis of their earlier work with small numbers. They use a variety of models, including discrete objects, length-based models (e.g., lengths of connecting cubes), and number lines, to model 'part-whole,' 'adding to,' 'taking away from,' and 'comparing' situations to develop an understanding of the meanings of addition and subtraction and strategies to solve such arithmetic problems. Children understand the connections between counting and the operations of addition and subtraction (e.g., adding two is the same as 'counting on' two). They use properties of addition (commutativity and associativity) to add whole numbers, and they create and use increasingly sophisticated strategies based on these properties (e.g., 'making tens') to solve addition and subtraction problems involving basic facts. By comparing a variety of solution strategies, children relate addition and subtraction as inverse operations.

Connections to the Grade 1 Focal Points (NCTM)

Number and Operations and Algebra: Children use mathematical reasoning, including ideas such as commutativity and associativity and beginning ideas of tens and ones, to solve two-digit addition and subtraction problems with strategies that they understand and can explain. They solve both routine and nonroutine problems.