Identify equations

Learning Objectives Define the term 'equation' as a number sentence with an equal sign. Identify the equal sign as the key component of an equation. Differentiate between a mathematical equation and a mathematical expression. Define a 'variable' as a letter that stands for an unknown number. Identify equations that contain variables. Explain that an equation shows two sides that are balanced or equal in value. Have you ever played on a seesaw? ⚖️ An equation is like a perfectly balanced seesaw, where both sides are exactly the same! In this lesson, you will become a math detective! You will learn how to spot special math sentences called equations and understand what makes them different from expressions. This is a key skill for solving all kinds of math...

TermDefinitionExample EquationA number sentence that uses an equal sign (=) to show that two amounts or expressions are equal.12 + 3 = 15 is an equation because it shows that 12 + 3 is the same as 15. ExpressionA group of numbers, variables, and operation signs. It shows a value but does NOT have an equal sign.12 + 3 is an expression. It has a value (15), but it doesn't state that it's equal to anything. Equal Sign (=)A symbol that means 'is the same as' or 'is equal to'. It is the most important part of an equation.In the equation 4 x 5 = 20, the equal sign tells us that the value of 4 x 5 is the same as 20. VariableA letter (like x, n, or a) that is used to represent a number we don't know yet.In the equation 7 + n = 10, the letter 'n' is the...

The Structure of an Equation Expression_1 = Expression_2 To be an equation, a number sentence MUST have an equal sign (=) with an expression on both sides of it. The Balance Rule Value of Left Side = Value of Right Side This rule helps us check if an equation is true. The total value of everything on the left of the equal sign must be exactly the same as the total value of everything on the right.