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Published this.

Christian Lawson-Perfect2 years, 2 months ago

Gave some feedback: Ready to use

Christian Lawson-Perfect2 years, 2 months ago

Saved a checkpoint:

Looks good!

Lauren Richards2 years, 2 months ago

Gave some feedback: Needs to be tested

Lauren Richards2 years, 2 months ago

I have deleted the part d) from this question and added in a much simpler question on squaring fractions.

Christian Lawson-Perfect2 years, 2 months ago

Gave some feedback: Has some problems

Christian Lawson-Perfect2 years, 2 months ago

This looks good, but part d seems vindictively hard! What's it assessing?

From the advice, it looks like:

• BODMAS - this isn't what the question's about
• Squaring fractions - have a smaller question on this earlier, e.g. "calculate $\left(\frac{a}{b}\right)^2$".
• Division of fractions - again, not what the question's about.

I reckon you could just delete part d, or spin it into a separate question.

Lauren Richards2 years, 3 months ago

Gave some feedback: Needs to be tested

Lauren Richards2 years, 3 months ago

Gave some feedback: Has some problems

Elliott Fletcher2 years, 3 months ago

Hi Lauren,

It seems that the answer to part c is rewarded 0 marks, i would maybe just reward 2 marks to this part as you have with the other parts.

Also, for part c, i would write "days" next to the answer box, just so it's a bit clearer what the units of the answer are.

I think there is also a slight issue in the advice section for part b, as sometimes the first fraction \displaystyle\simplify{{k}/{j}}, simplifies too much, for example i saw that number as 5 but i think the intended number was 15/3 because then later in the code when you are multiplying the numerators and denominators of both fractions this shows 15 x \var{numif} and 3 x \var{h}, so because the question shows the first fraction in it's simplified form, it's not immediately clear where the other two numbers come from. To fix this, i would maybe set the gcd of k and j to be equal to 1.

Let me know if you have any questions, otherwise i think it looks good!

Lauren Richards2 years, 3 months ago

Thank you for the feedback. I have enacted your suggestions and corrected the mistakes.

Lauren Richards2 years, 3 months ago

Gave some feedback: Needs to be tested

Vicky Hall2 years, 3 months ago

I would change the staement to say something like 'evaluate the following multiplications, giving each fraction in its simplest form'.

In part b), the expected answer is incorrect. When I tried it, the fraction in its lowest terms was $\displaystyle\frac{81}{104}$ but the expected answer said $\displaystyle\frac{162}{208}$. The correct answer appears in the advice though.

In part c) the fractions $\displaystyle\frac{3}{7}$ and $\displaystyle\frac{1}{3}$ should be variables. I know you've picked these numbers so that the answer always comes out as a whole number of days, which of course it must, but it would be much better to get Numbas to produce the variables so that the sum will always work out nicely, otherwise students can only do the question once. Also, display these fractions using \frac.

In the advice, you tend to use colons before stating a result. For example, '...final answer is: $\displaystyle\frac{81}{104}$'. You don't need the colon here, just give the number.

Vicky Hall2 years, 3 months ago

Gave some feedback: Has some problems

Lauren Richards2 years, 3 months ago

Gave some feedback: Needs to be tested

Lauren Richards2 years, 3 months ago

Created this.
Fraction multiplication Ready to use Lauren Richards 01/08/2017 15:15
Harder questions involving fractions Should not be used Lauren Richards 01/08/2017 15:07
Jo-Ann's copy of Fraction multiplication draft Jo-Ann Lyons 08/10/2018 13:57

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