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Maths year 11

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Original post by z_o_e
How do I do Q2?

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You'd get the greatest area by considering the upper bounds of the two sides.
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Original post by RDKGames
You'd get the greatest area by considering the upper bounds of the two sides.


So 12.5+11.5



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Original post by z_o_e


Of course not. You don't add the two numbers for an area of a rectangle, silly! :tongue:
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Original post by RDKGames
Of course not. You don't add the two numbers for an area of a rectangle, silly! :tongue:


Omg I multiply them!!!

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Original post by RDKGames
Of course not. You don't add the two numbers for an area of a rectangle, silly! :tongue:


Omg. Could you please do a demonstration on multiplying decimals.

I forgot the column method .
I always use a calculator! !

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Original post by z_o_e
Omg. Could you please do a demonstration on multiplying decimals.

I forgot the column method .
I always use a calculator! !

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It's the same way as multiplying something by 245 where you split it into 200, 40 and 5 but if it's 2.45 then you split it into 2, 0.40 and 0.05.
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Original post by RDKGames
It's the same way as multiplying something by 245 where you split it into 200, 40 and 5 but if it's 2.45 then you split it into 2, 0.40 and 0.05.


I forgot how to multiply! By written methods. I'm getting them wrong.

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Original post by z_o_e
I forgot how to multiply! By written methods. I'm getting them wrong.

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Show me how you would multiply something like 123 * 456 and I'll tell you how to adapt it to decimals
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Original post by RDKGames
Show me how you would multiply something like 123 * 456 and I'll tell you how to adapt it to decimals



I tried all the methods I knew!

I think I need to work on my multiplication.
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Original post by z_o_e
I tried all the methods I knew!

I think I need to work on my multiplication.
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To do 123 x 456 you can do (100+20+3)(400+50+6) and expand brackets as you normally would.
Original post by z_o_e
I tried all the methods I knew!

I think I need to work on my multiplication.
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How about this: remember when you converted decimals into fractions? You can do the same thing here! 12.5=12.5/1=125/10 and 11.5=115/10

Then it simply becomes 125/10 * 115/10 which you can do.

Otherwise, I'd find the table method much more straight forward.
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Original post by RDKGames
How about this: remember when you converted decimals into fractions? You can do the same thing here! 12.5=12.5/1=125/10 and 11.5=115/10

Then it simply becomes 125/10 * 115/10 which you can do.

Otherwise, I'd find the table method much more straight forward.


Could you do an example of this on paper please?

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Original post by z_o_e
Could you do an example of this on paper please?

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ImageUploadedByStudent Room1471556559.276243.jpg


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Original post by RDKGames


What method do you prefer column or table?

Isn't Column easier? I find it hard but the table method takes too long

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Original post by z_o_e
What method do you prefer column or table?

Isn't Column easier? I find it hard but the table method takes too long

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I don't have a preference as they mean the same thing to me in terms of difficulty aha. Just pick whichever one you'd most comfortable with using.
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Original post by RDKGames


I did it like this.. I took the decimals out.
But my final answer can move the two decimal places into the final answer.

But I got it wrong :frown:

I did it on my whiteboard and I got it right.


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Original post by RDKGames
I don't have a preference as they mean the same thing to me in terms of difficulty aha. Just pick whichever one you'd most comfortable with using.


I find column confusing tbh

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Ohhh I was suppose to add the lines downwards




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Reply 1038
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Original post by RDKGames
How about this: remember when you converted decimals into fractions? You can do the same thing here! 12.5=12.5/1=125/10 and 11.5=115/10

Then it simply becomes 125/10 * 115/10 which you can do.

Otherwise, I'd find the table method much more straight forward.


Here I did question 3



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Reply 1039
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How would I do question 4 though?


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