# [Maths-Education] Not just Ratio and Proportion

**Dave Hewitt**
D.P.Hewitt@bham.ac.uk

*Tue, 9 Oct 2001 13:44:53 +0000 [GMT]*

>* How about this. also from the KS3 framework (p82 of examples):
*>*
*>* Understand that:
*>* * Multiplication is equivalent to and is more efficient than repeated
*>* addition
*
Let me see now... circumference of a circle is pi multiplied by
diameter. If my diameter is, for example, 11.37cm, in what way
does the image of repeated addition help me with this
multiplication?
Dave.
Dr Dave Hewitt
Senior Lecturer in Mathematics Education
School of Education
University of Birmingham
Edgbaston
Birmingham
B15 2TT
UK
Phone: +44 (0)121 414 4824
Fax: +44 (0)121 414 4865
Email: D.P.Hewitt@bham.ac.uk