Aavishkaar,
(2021)
Which is the best deal?
At Right Angles (10).
pp. 4248.
ISSN 25821873
Abstract
This article presents a task
in which students explore
how to help a shopkeeper
decide the best deal for
purchasing soaps from
three different wholesalers.
The students express the
options in the language of
mathematics to find the
cost for a certain number
of soaps. They further write
linear equations to find the
changeover point at which
a different shop becomes a
better deal. The exploration
task lets students “get
inside” the mathematics and
appreciate how algebra can
be used in decision making.
This task is suitable for
students of classes 8 to 10. It
covers the content domains
of Arithmetic, Algebraic
Expressions, Linear Equations
and Coordinate Geometry.
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