Writing Numerical Expressions

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operation symbols, but no variables. For example, 3 + 5 or 2 × (4 + 6).

Front

What does 'sum' mean in mathematics?

Back

The sum is the result of adding two or more numbers together. For example, the sum of 4 and 5 is 9.

Front

What does 'difference' mean in mathematics?

Back

The difference is the result of subtracting one number from another. For example, the difference between 10 and 4 is 6.

Front

How do you express '20 times the sum of 4 and 2' in numerical form?

Back

20 × (4 + 2) is the correct expression.

Front

What does 'times' indicate in a numerical expression?

Back

'Times' indicates multiplication. For example, 3 times 4 means 3 × 4.

Front

What is the expression for '4 times the sum of 34 and 8'?

Back

4 × (34 + 8) is the correct expression.

Front

How do you express '8 times the difference between 43 and 38'?

Back

8 × (43 - 38) is the correct expression.

Front

What does 'half of' mean in a numerical expression?

Back

'Half of' means to divide by 2. For example, half of 10 is 10 ÷ 2.

Front

What is the expression for 'half of the difference between 26 and 18'?

Back

(26 - 18) ÷ 2 is the correct expression.

Front

What does 'triple' mean in a numerical expression?

Back

'Triple' means to multiply by 3. For example, triple of 5 is 5 × 3.