Lesson 26 Chunking in algebra
A workshop makes silk scarves for a shop.
The shop decides the final length (not including the tassels) and final width required for each scarf. Call these l and w.
The workshop calculates the starting size of the rectangle of silk by adding 18 cm to the
length for the tassels and 4cm to the width for the edging.
It charges the shop by the area of the starting size of the rectangle of silk used in the scarf.
1. Write an expression for the starting width for any size scarf.
2. Write an expression for the starting length.
3. Write a mathematical expression forthe starting area of any size scarf.
Multiply out your answer to question 2 to give four chunks in a new expression.
Write down the meaning of each chunk. (Use arrows,or rings,or colours.)