Best Buys
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Question 1 of 3
1. Question
Find the best value among the following tubs of ice cream.Hint
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There are `2` ways of identifying the best buy among a list of items.`1.` Find the dollars per unit of each item, or
`2.` Find the units per dollar of each itemSince the values are given in dollars per litre, let’s find the dollars per `1` litre of each item.Mango:`$6.95` `=` `1L` Vanilla:`$8.95` `=` `1.5L` `$8.95``-:1.5` `=` `1.5L``-:1.5` Divide both sides by `1.5` `$5.97` `=` `1L` Raspberry:`$18.05` `=` `3L` `$18.05``-:3` `=` `3L``-:3` Divide both sides by `3` `$6.05` `=` `1L` Among the three items, Vanilla ice cream has the lowest dollar per litre. Therefore, it is the best buy.Vanilla -
Question 2 of 3
2. Question
Find the best buy among these three packets of potato chips.Hint
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There are `2` ways of identifying the best buy among a list of items.`1.` Find the dollars per unit of each item, or
`2.` Find the units per dollar of each itemSince the values are given in grams per dollar, let’s find the grams per `$1` of each item.Crispee:`60`g `=` `99`c `60`g `=` `$0.99` Convert cents to dollars `=` $$\frac{60\mathsf{g}}{\$0.99}$$ Turn values into a fraction `=` $$\frac{60\mathsf{g}\color{#CC0000}{\div0.99}}{\$0.99\color{#CC0000}{\div0.99}}$$ Divide top and bottom by the denominator `=` $$\frac{60.6\mathsf{g}}{\$1}$$ Rocky:`120`g `=` `$2.05` `=` $$\frac{120\mathsf{g}}{\$2.05}$$ Turn values into a fraction `=` $$\frac{120\mathsf{g}\color{#CC0000}{\div2.05}}{\$2.05\color{#CC0000}{\div2.05}}$$ Divide top and bottom by the denominator `=` $$\frac{58.5\mathsf{g}}{\$1}$$ Salty:`200`g `=` `$4.40` `=` $$\frac{200\mathsf{g}}{\$4.40}$$ Turn values into a fraction `=` $$\frac{200\mathsf{g}\color{#CC0000}{\div4.40}}{\$4.40\color{#CC0000}{\div4.40}}$$ Divide top and bottom by the denominator `=` $$\frac{45.5\mathsf{g}}{\$1}$$ Among the three items, Crispee has the highest grams per dollar. Therefore, it is the best buy.Crispee -
Question 3 of 3
3. Question
Find the best buy among these three sizes of coffee beans.Hint
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There are `2` ways of identifying the best buy among a list of items.`1.` Find the dollars per unit of each item, or
`2.` Find the units per dollar of each itemSince the values are given in grams per dollar, let’s find the grams per `$1` of each item.Braziliano:`500`g `=` `$12.85` `=` $$\frac{500\mathsf{g}}{\$12.85}$$ Turn values into a fraction `=` $$\frac{500\mathsf{g}\color{#CC0000}{\div12.85}}{\$12.85\color{#CC0000}{\div12.85}}$$ Divide top and bottom by the denominator `=` $$\frac{38.91\mathsf{g}}{\$1}$$ Turkish:`375`g `=` `$9.90` `=` $$\frac{375\mathsf{g}}{\$9.90}$$ Turn values into a fraction `=` $$\frac{375\mathsf{g}\color{#CC0000}{\div9.90}}{\$9.90\color{#CC0000}{\div9.90}}$$ Divide top and bottom by the denominator `=` $$\frac{37.88\mathsf{g}}{\$1}$$ Africanno:`200`g `=` `$4.99` `=` $$\frac{200\mathsf{g}}{\$4.99}$$ Turn values into a fraction `=` $$\frac{200\mathsf{g}\color{#CC0000}{\div4.99}}{\$4.99\color{#CC0000}{\div4.99}}$$ Divide top and bottom by the denominator `=` $$\frac{40.08\mathsf{g}}{\$1}$$ Among the three items, Africanno has the highest grams per dollar. Therefore, it is the best buy.Africanno