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Once Upon a Time in the Land of Algebra…. Story 1. Two of my favourite things in the world (apart from Maths) are KitKat Chunkys and Haribos … Choose some letters to represent KitKat Chunky’s and Haribos….

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story 1
Story 1

Two of my favourite things in the world (apart from Maths) are KitKat Chunkys and Haribos …

Choose some letters to represent KitKat Chunky’s and Haribos…

slide3
When I was in the shop the other day, I bought three packets of Haribo, and two KitKat Chunkys…

But that wasn’t enough, so I bought one more of each…

slide4
But even that wasn’t enough, so I bought three more packets of Haribo, and two more KitKat Chunkys…

But just before I could eat any of them, my greedy Mum stole six packets of Haribo, and three KitKat Chunkys off me…

slide5
The shopkeeper felt sorry so me, and so he made sure I left the shop with TWICE as many of each sweet…

How many sweets did I leave the shop with…

story 2
Story 2

Whilst I was watching England play Spain last night, I fancied a little snack, so I poured my self some peanuts in a bowl…

Choose a letter to represent the number of peanuts in the bowl…

slide7
During the first half I ate 6 peanuts…

One peanut went down the ‘wrong way’, and I ended up coughing it back up into the bowl…

slide8
Whilst I was making a cup of tea, my greedy flatmate stole 5 peanuts…

Because I caught her ‘red-handed’, she agreed to put some Malteasers in the bowl. Choose a letter to represent the number of Malteasers…

slide9
I told her that that wasn’t enough to make up for the loss of my peanuts, so she gave me DOUBLE the number of Malteasers…

How many peanuts and Malteasers did I end up with in my bowl…

story 3
Story 3

Last Friday, after a stressful week at The Minster School, I needed a drink of beer, so I went to the pub

Choose a letter to represent the price of a pint of beer…

slide11
Whenever I ordered a pint of beer the barman told me that because of a shortage, the price of beer had doubled…

I wasn’t happy, but I was thirsty, so I ordered 3 pints…

slide12
I was also quite hungry, so I decided to buy some crisps…

Choose a letter to represent the price of crisps…

slide13
It really wasn’t my night, because the barman also told me that the price of crisps had TRIPLED…

I was feeling very hungry, so I still bought 4 packets…

slide14
Just before I left the pub I had one more packet of crisps, and one more beer …

How much money did I spent in total…

algebra 2 18 th november
Algebra 218th November
  • We can add or subtract ‘LIKE TERMS’

e.g. m + m =

or 6t – 3t =

BUT!

We CANNOT add or subtract DIFFERENT terms

e.g. 5s + 6t IS NOT

8m – 2y IS NOT

2m

3t

11st

6my

slide16
We can SIMPLIFY expressions by adding or subtracting the LIKE TERMS

e.g. 4p + 3t + 2p + 5t =

5x + 8y – 3y – 2x =

6a + 3b - 2c + 4 – b – 3a + c - 2 =

6p + 8t

3x + 5y

3a + 2b – c + 2

i think of a number
I think of a Number…
  • I add 2
  • I add 4
  • I subtract 3
  • I subtract 2
  • I add 6
  • And I get… 10
i think of a number18
I think of a Number…
  • I subtract 5
  • I add 2
  • I subtract 4
  • I add 5
  • I subtract 2
  • And I get… 21
i think of a number19
I think of a Number…
  • I multiply it by 2
  • I multiply it by 3
  • I multiply it by 3 again
  • I divide it by 6
  • I multiply it by 2
  • And I get… 60