Best Buy When you go shopping for groceries it can be confusing to determine which brand is the “better buy”. For example if you see 1.5L of softdrink for $2.20 and 2L of softdrink for $3.10, it is not immediately obvious which is the better buy. First we see what each costs for 1L. 3.10 ÷ 2 = $1.55/L 2.20 ÷ 1.5 = $1.47/L So the better buy is the 1.5 L softdrink.
* Task a
r o e t s Bo r e p ok u S
Determine which of the following is the “better buy”.
c. 30 m of plastic wrap for $3.90 or 45 m of plastic wrap for $4.50.
b. 2 cans of baked beans for $1.90 or 3 cans of baked beans for $2.95.
ew i ev Pr
Teac he r
a. 1L of icecream for $5.10 or 600ml of icecream for $2.80.
d. 40 g of tuna for $1.05 or 250g of tuna for $5.80.
© ReadyEdPubl i cat i ons o rr ev i e w u s sitems on y• the supermarket they often claimp that if r youp buyo two ore three of al particular * Task b•Atf product then you will save money.
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m . u
a. Do you think you are always really saving money if you buy two or three items instead of just one? _________________________________________________________________________
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b. A loaf of bread costs $4.70 but if you buy two loaves it will cost you $8.00.
c. A cake-mix costs $2.40 but if you buy two cake mixes it costs $4.
i) How much money do you save?
i) How much money do you save?
ii) What percentage do you save?
ii) What percentage do you save?
o c . che e r o t r s super
* Task c: Class Challenge
Each student in the class is to present two products, like those in Task A. Each student can write their two products on the board and every other member of the class is to determine which product is the "best buy".
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