Combining fractions

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Christian Lawson-Perfect 7 years, 9 months ago

Saved a checkpoint:

Made the marking script cope with negative answers. (Whoops!)

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Christian Lawson-Perfect 8 years, 6 months ago

Saved a checkpoint:

Added a marking script to make sure the student's answer is reduced.

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Bill Foster 55 years, 2 months ago

Created this.

Name	Status	Author	Last Modified
Combining fractions	draft	Bill Foster	06/08/2020 08:42
Lois's copy of Combining fractions	draft	Lois Rollings	02/09/2016 12:47

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Question statement

{dosomething} the following fractions and reduce the resulting fraction to lowest form.

Give any introductory information the student needs.

			Name	Type	Generated Value

a	integer	2
b	integer	1
g	integer	11
dosomething	string	Take away
f	integer	10
op	integer	-1
action1	string	taking away
action	string	Taking away

Automatically regenerate variables?

Name

Data type

Value

xxxxxxxxxx
 
random(1..11)

JME function reference

Description

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

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Generated value: `integer`

This variable doesn't seem to be used anywhere.

Parts

Gap-fill
1. Gap Mathematical expression
  Add
1. Step Information only

Gap-fill

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

$\displaystyle \simplify[std]{{a} / {g} + ({op*b} / {f})} =$ Unnamed gap

No decimal numbers allowed.

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Advice

The rule for {action1} fractions is \[\simplify{a/b+ {op}*(c/d)=(a*d+{op}*b*c)/(b*d)}.\]
In this case we have:
\[\simplify[std,!unitFactor]{{a} / {g} + ({op*b} / {f}) = ({a} * {f} + {g} * {op*b}) / ({g} * {f}) ={a*f+op*g*b}/{g*f}}.\]
Note that this fraction is in its lowest form as there are no common factors in the denominator and the numerator.

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Part	Test	Passed?
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Mathematical expression
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Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Christian Lawson-Perfect 7 years, 9 months ago

Christian Lawson-Perfect 8 years, 6 months ago

Bill Foster 55 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: `integer`

Parts

Gap-fill

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Combining fractions

Metadata

Taxonomy: mathcentre

Taxonomy: Kind of activity

Taxonomy: Context

Contributors

History

Comment

Checkpoint description

Christian Lawson-Perfect 7 years, 9 months ago

Christian Lawson-Perfect 8 years, 6 months ago

Bill Foster 55 years, 2 months ago

Error in variable testing condition

Error

Warning

Generated value: integer

Parts

Gap-fill

Generated value: `integer`