Numerical Expressions

Front

What does the word 'sum' mean in mathematics?

Back

The sum is the result of adding two or more numbers together.

Front

Which symbol represents addition?

Back

The symbol for addition is +.

Front

What is a numerical expression?

Back

A numerical expression is a combination of numbers and operations (like +, -, x, ÷) without an equal sign.

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equal sign, while an equation does.

Front

What does the term 'difference' refer to in mathematics?

Back

The difference is the result of subtracting one number from another.

Front

How do you express '4 times 5' in numerical form?

Back

4 times 5 is expressed as 4 x 5.

Front

Back

The result is 17.

Front

How do you express 'the sum of 7 and 8 times 98' in numerical form?

Back

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value.

Front

What is the order of operations in mathematics?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). This is often remembered by the acronym PEMDAS.