Try to answer the following questions here:

• What is this question used for?
• What does this question assess?
• What does the student have to do?
• How is the question randomised?
• Are there any implementation details that editors should be aware of?

### History and Feedback

#### Checkpoint description

Describe what's changed since the last checkpoint.

#### Christian Lawson-Perfect6 months ago

Saved a checkpoint:

Replaced javascript in part cwith a pattern restriction.

Published this.

#### Christian Lawson-Perfect2 years, 4 months ago

Gave some feedback: Ready to use

#### Christian Lawson-Perfect2 years, 4 months ago

Saved a checkpoint:

I've reworded the statement and some of the prompts, and added a separate "simplify your expression step" using pattern-matching so that the first one doesn't have to be simplified.

I've also reworded the advice quite heavily.

#### Bradley Bush2 years, 4 months ago

Gave some feedback: Needs to be tested

#### Chris Graham2 years, 4 months ago

Looks good. You still talk about single sweets in part (c) and in the advice, so you'll need to change to packets there too.

#### Bradley Bush2 years, 4 months ago

Thank you for the advice. I started with one part, you asked for two and now you've got 3.  I did forget to mention that they were super delux sweets, however I have altered them to packets for clarity sake. I have also followed through with the other suggestions you've made.

#### Chris Graham2 years, 4 months ago

Gave some feedback: Has some problems

#### Chris Graham2 years, 4 months ago

Why only one part? There doesn't seem to be any good reason why it shouldn't be in two parts.

£2 for a lollipop?! They are unreasonably expensive sweets. May need a re-think to make this more realistic. You state Jerry eats a lot and I would disagree (based on my own sweet-eating habits), so perhaps these could be packets of sweets?

You have mixed singular "Jerry", and plural "they".

A good addition would be to add a step to (what will be) part a) which asks for an expression for each of the 3 components. This bit should also be above the cost equation in the advice. "we can see that the unsimplified expression..." can't be seen at all, until those steps have been taken.

#### Bradley Bush2 years, 4 months ago

Gave some feedback: Needs to be tested

#### Bradley Bush2 years, 4 months ago

Created this as a copy of Expand brackets and collect like terms.
Expand brackets and collect like terms Ready to use Bradley Bush 16/05/2019 16:48
Create an algebraic expression from a word problem, simplify, and evaluate Ready to use Bradley Bush 16/05/2019 16:41
Expand brackets and collect like terms draft Breanne Chryst 23/08/2017 15:42
Expand brackets and collect like terms 2 draft Breanne Chryst 23/08/2017 15:43
Expand brackets and collect like terms 3 draft Breanne Chryst 23/08/2017 15:42
Solve equations draft Breanne Chryst 23/08/2017 14:39
Hollie's copy of Expand brackets and collect like terms draft Hollie Tarr 17/09/2017 15:18
Collect like terms draft Lyn Gardner 05/10/2017 13:33
Lyn's copy of collect like terms 2 draft Lyn Gardner 05/10/2017 13:38
Lyn's copy of Solve equations draft Lyn Gardner 05/10/2017 16:44
Raphael's copy of Expand brackets and collect like terms draft Raphael Stuhlmeier 23/11/2017 13:28
Expand brackets and collect like terms draft Owen Jepps 11/01/2018 06:08
samla lika termer draft Ida Landgärds 10/04/2018 14:19
Ida's copy of samla lika termer draft Ida Landgärds 10/04/2018 14:21
Ida's copy of samla lika termer draft Ida Landgärds 10/04/2018 14:24
Marte's copy of Expand brackets and collect like terms draft Marte Bråtalien 12/04/2018 11:01
Marte's copy of Expand brackets and collect like terms draft Marte Bråtalien 12/04/2018 11:01
Samantha's copy of Create an algebraic expression from a word problem, simplify, and evaluate draft Samantha Konig 28/06/2018 05:55
Samantha's copy of Create an algebraic expression from a word problem, simplify, and evaluate draft Samantha Konig 28/06/2018 05:56
Expand brackets and collect like terms draft Paul Hancock 24/07/2018 02:40
Expand brackets and collect like terms[L4 Randomised] Needs to be tested Matthew James Sykes 25/07/2018 13:56
NUMBAS - Collect like terms Ready to use Katy Dobson 16/10/2018 09:05
Heather's copy of Expand brackets and collect like terms[L4 Randomised] draft Heather Driscoll 01/10/2018 15:40
Expand brackets and collect like terms Has some problems Angharad Thomas 25/10/2018 17:50
Expand brackets and collect like terms - two questions Ready to use Angharad Thomas 25/10/2018 08:21
Angharad's copy of Create an algebraic expression from a word problem, simplify, and evaluate draft Angharad Thomas 25/10/2018 17:53
Francis's copy of Expand brackets and collect like terms - two questions draft Francis Duah 11/11/2018 15:28
Create an algebraic expression from a word problem, simplify, and evaluate in dollars version Ready to use Maria Aneiros 18/05/2019 02:13
Maria's copy of Expand brackets and collect like terms draft Maria Aneiros 29/05/2019 05:57
Maria's copy of Create an algebraic expression from a word problem, simplify, and evaluate draft Maria Aneiros 29/05/2019 05:09
Adelle's copy of Create an algebraic expression from a word problem, simplify, and evaluate draft Adelle Colbourn 27/08/2019 00:09
Paul's copy of Create an algebraic expression from a word problem, simplify, and evaluate, in euro version draft Paul Verheyen 01/11/2019 18:15
Paul's copy of Create an algebraic expression from a word problem, simplify, and evaluate, in euro version draft Paul Verheyen 03/09/2019 19:44
WordProblem01 Has some problems Paul Verheyen 12/09/2019 17:21
WordProblem01_NL Ready to use Paul Verheyen 28/09/2019 18:14
Paul's copy of Expand brackets and collect like terms draft Paul Verheyen 03/11/2019 19:11
W2a Rearrange - Expand brackets and collect like terms Ready to use Timur Zaripov 08/10/2019 17:01
Johan's copy of WordProblem01_NL draft Johan Maertens 03/11/2019 11:33

Give any introductory information the student needs.

No variables have been defined in this question.

(a number)

Numbers between and (inclusive) with step size
A random number between and (inclusive) with step size

(text string)

(numbers)

(text strings)

This variable is an HTML node. HTML nodes can not be relied upon to work correctly when resuming a session - for example, attached event callbacks will be lost, and mathematical notation will likely also break.

If this causes problems, try to create HTML nodes where you use them in content areas, instead of storing them in variables.

Describe what this variable represents, and list any assumptions made about its value.

This variable doesn't seem to be used anywhere.

Name Type Generated Value

#### Error in variable testing condition

There's an error in the condition you specified in the Variable testing tab. Variable values can't be generated until it's fixed.

Error:

for seconds

Running for ...

No parts have been defined in this question.

Select a part to edit.

The correct answer is an equation. Use the accuracy tab to generate variable values satisfying this equation so it can be marked accurately.

#### Checking accuracy

Define the range of points over which the student's answer will be compared with the correct answer, and the method used to compare them.

#### Variable value generators

Give expressions which produce values for each of the variables in the expected answer. Leave blank to pick a random value from the range defined above, following the inferred type of the variable.

#### String restrictions

Both choices and answers must be defined for this part.

Help with this part type

##### Base marking algorithm

#### Test that the marking algorithm works

Check that the marking algorithm works with different sets of variables and student answers using the interface below.

Create unit tests to save expected results and to document how the algorithm should work.

There's an error which means the marking algorithm can't run:

Name Value

Note
Value Feedback

Click on a note's name to show or hide it. Only shown notes will be included when you create a unit test.

#### Unit tests

No unit tests have been defined. Enter an answer above, select one or more notes, and click the "Create a unit test" button.

The following tests check that the question is behaving as desired.

### This test has not been run yet This test produces the expected output This test does not produce the expected output

This test is not currently producing the expected result. Fix the marking algorithm to produce the expected results detailed below or, if this test is out of date, update the test to accept the current values.

One or more notes in this test are no longer defined. If these notes are no longer needed, you should delete this test.

Name Value

 This note produces the expected output

This test has not yet been run.

When you need to change the way this part works beyond the available options, you can write JavaScript code to be executed at the times described below.

Run this script the built-in script.

This script runs after the built-in script.

To account for errors made by the student in earlier calculations, replace question variables with answers to earlier parts.

In order to create a variable replacement, you must define at least one variable and one other part.

The variable replacements you've chosen will cause the following variables to be regenerated each time the student submits an answer to this part:

These variables have some random elements, which means they're not guaranteed to have the same value each time the student submits an answer. You should define new variables to store the random elements, so that they remain the same each time this part is marked.

### Parts

Give a worked solution to the whole question.

### Preamble

This script will run after the question's variable have been generated but before the HTML is attached.
Apply styling rules to the question's content.

This question is used in the following exams: