110 likes | 253 Views
Introducing Tak-tiles. Algebra using areas. area a. area b. Adding Areas. area b. area a. This has an area of a. and this has an area of b. So this shape has area. a. + b. Think about this shape;. It could be made like this. Or like this. a + b. a + b. 2 a. + 2 b. =.
E N D
Introducing Tak-tiles Algebra using areas
area a area b Adding Areas area b area a This has an area of a and this has an area of b So this shape has area a + b
Think about this shape; It could be made like this Or like this a + b a + b 2a + 2b = 2(a + b) 2a + 2b
How many different ways can you find of writing the areas of these shapes? b) a) c) d) f) e) g)
How did you do g? and I take away area b I’m left with area a - b If this has area a This has area + (a – b) a 4(2a - b) 3 2 4 2a - b 1 times time OR Which is
So now can you do these? Remember to write them in as many different ways as you can find!! b) d) a) c) e) f) g) h)
area b The 5 ‘easy’ Tak-tiles If the area of the square is a area a and the area of the quadrant is b Then the area of this shape is OR a + 2b b + a + b So what about these? area a + 2b area 4a - 2b area 3a - b area 2a
What about this shape? OR a + 2b + 4a - 2b + 3a - b ________________ 8a + 3b - 4b a +4a – 3a +2b - 2b - b This has area ________________ 8a - b 8a - b Which is Which is
Can you do this shape in the same way? 3a - b + a + 2b + 2a 2b 11a + 3b - area + a + 2b 11a + b + 4a - 2b ________________ 11a + b ________________