Understanding Numerical Expressions

What is the correct numerical expression for the sum of five and 34 minus 80?

• 34 + 5 + 80

• 80 - 34 - 5

• 5 + 34 - 80

• 5 - 34 + 80

In the expression 5 + 34 - 80, what operation is performed first?

• Multiplication

• Subtraction

• Division

• Addition

How do you express the difference of 30 and 15?

• 15 - 30

• 15 + 30

• 30 - 15

• 30 + 15

What is the correct expression for the difference of 30 and 15 plus 21?

• 30 - 15 + 21

• 30 + 15 - 21

• 15 - 30 + 21

• 21 + 30 - 15

In the expression 30 - 15 + 21, which operation is performed last?

• Subtraction

• Addition

• Division

• Multiplication