Arithmetic expressions

In this lesson, we will understand the rules of operator precedence when evaluating arithmetic expressions. We will be reminded of BIDMAS, before investigating code that uses various arithmetic expressions. This lesson will prepare us for the next lesson, where we will begin to use conditions in programming.

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Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.True or False: Pseudorandom number generation uses mathematical algorithms which are computer-generated and therefore highly predictable.

1/4

Q2.If you want to comment on your code over multiple lines, what syntax should you use?

2/4

Q3.When using the function randrange(1,5,2), what is the third value in the brackets used for?

3/4

Q4.When using the function randrange(1,5,2), what is the second value in the brackets used for?

4/4

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.True or False: Pseudorandom number generation uses mathematical algorithms which are computer-generated and therefore highly predictable.

1/4

Q2.If you want to comment on your code over multiple lines, what syntax should you use?

2/4

Q3.When using the function randrange(1,5,2), what is the third value in the brackets used for?

3/4

Q4.When using the function randrange(1,5,2), what is the second value in the brackets used for?

4/4

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Arithmetic Expressions

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is the evaluation of this expression: 10 * 10 / 5

1/4

Q2.What is the evaluation of this expression: 5 - 2 + 6 / 2

2/4

Q3.If you were using integer division, what would be the evaluation of this expression: 14//3

3/4

Q4.If you were using modulo, what would be the evaluation of this expression: 14%3

4/4

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Arithmetic Expressions

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is the evaluation of this expression: 10 * 10 / 5

1/4

Q2.What is the evaluation of this expression: 5 - 2 + 6 / 2

2/4

Q3.If you were using integer division, what would be the evaluation of this expression: 14//3

3/4

Q4.If you were using modulo, what would be the evaluation of this expression: 14%3

4/4

Lesson summary: Arithmetic expressions

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