Numbas Input: Algebraic Fractions

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Lois Rollings

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From users who are not members of Using Numbas :

Christian Lawson-Perfect

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Ready to use

8 years, 9 months ago

History

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Christian Lawson-Perfect 8 years, 9 months ago

Gave some feedback: Ready to use

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Lois Rollings 9 years, 7 months ago

Created this as a copy of Input 5.

Name	Status	Author	Last Modified
Input 5	Ready to use	Christian Lawson-Perfect	01/06/2016 11:03
Numbas Input: Algebraic Fractions	Ready to use	Lois Rollings	27/07/2016 10:57
Input 5	Ready to use	Julie Crowley	26/07/2016 12:52
Julie's copy of Input 5	Ready to use	Julie Crowley	26/07/2016 12:53
Basic Algebraic input for numbas	Ready to use	Julie Crowley	07/10/2016 17:00
Input 5	draft	steve kilgallon	18/08/2016 16:12
Hvordan skrive tall og algebraiske uttrykk inn i Numbas?	draft	Ida Friestad Pedersen	02/11/2016 07:35
ingresar expresiones algebraicas en Numbas	draft	Ricardo Monge	05/10/2017 19:36
Clare's copy of Input 5	draft	Clare Lundon	09/09/2019 08:33

There are 24 other versions that do you not have access to.

Question statement

This question shows you how to input algebraic fractions.

You need to be careful to use brackets to show what goes into the numerator (top) and what into the denominator (bottom) of the fraction.

Remember that you will see what the system thinks you have entered.

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	6
c	integer	5
b	integer	13
d	integer	8

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(2..16#2)

JME function reference

Description

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

Can an exam override the value of this variable?

Generated value: `integer`

→ Used by:

This variable doesn't seem to be used anywhere.

Parts

Part a) Gap-fill
1. Gap Choose several from a list
  Add
Part b) Gap-fill
1. Gap Mathematical expression
  Add
Part c) Gap-fill
1. Gap Mathematical expression
  Add
Part d) Gap-fill
1. Gap Mathematical expression
  Add

Gap-fill

Ask the student a question, and give any hints about how they should answer this part.

Suppose you want to input the expression $\displaystyle \frac{\var{a}+\var{b}x}{\var{c}+\var{d}y}$ .

Choose which of the following inputs are incorrect?

Unnamed gap

After you have clicked Submit part, click on Show Feedback and you will be given more detail on your choices.

Advice

a)

The correct input is ({a}+{b}x)/({c}+{d}y) - the rest are incorrect and you should have chosen those.

b)

A correct input is ({b} + {a}y) / ({c} + {d}z). Also correct is ({a}y+{b}) / ({c} + {d}z) etc.

c)

A correct input is ({d}z + {b}) / ((x + {a})*(y + {c})).

Note the denominator (the bottom of the ratio) has to have two brackets, i.e. ((x + {a})*(y + {c})) as otherwise the expression ({d}z + {b}) / (x + {a})*(y + {c}) is seen by the system as $\displaystyle \left(\simplify[std]{({d} * z + {b}) / (x + {a})}\right) (y + \var{c})$

d)

A correct input is ({a} -({b}x + {c})*e ^ ( -{2}x)) / ((x + {2*b})*(y -{3*d})).

Give a worked solution to the whole question.

Use this tab to check that this question works as expected.

There was an error which means the tests can't run:

Part	Test	Passed?
Gap-fill
Gap-fill		Hasn't run yet
Choose several from a list
Choose several from a list		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet
Gap-fill
Gap-fill		Hasn't run yet
Mathematical expression
Mathematical expression		Hasn't run yet

This question is used in the following exam:

Numbas Practice Questions by Lois Rollings in Module tests.

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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

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Comment

Checkpoint description

Christian Lawson-Perfect 8 years, 9 months ago

Lois Rollings 9 years, 7 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

a)

b)

c)

d)

Loading...

Error

Numbas Input: Algebraic Fractions

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

Feedback

History

Comment

Checkpoint description

Christian Lawson-Perfect 8 years, 9 months ago

Lois Rollings 9 years, 7 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

a)

b)

c)

d)

Generated value: `integer`