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Maths year 11

1. (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.
2. (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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3. (Original post by z_o_e)
So 12.5+11.5

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Of course not. You don't add the two numbers for an area of a rectangle, silly!
4. (Original post by RDKGames)
Of course not. You don't add the two numbers for an area of a rectangle, silly!
Omg I multiply them!!!

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5. (Original post by RDKGames)
Of course not. You don't add the two numbers for an area of a rectangle, silly!
Omg. Could you please do a demonstration on multiplying decimals.

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

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6. (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.
7. (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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8. (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
9. (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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10. (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.
11. (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.
12. (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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13. (Original post by z_o_e)
Could you do an example of this on paper please?

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14. 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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15. (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.
16. 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

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

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17. (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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18. Ohhh I was suppose to add the lines downwards

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19. (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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20. How would I do question 4 though?

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