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Question 1 of 3
Electricity costs 20.52¢ per unit. How much would 500 units cost in dollars?
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First, list down the given values in the problem.
Cost per unit: 20.52¢
Total units: 500
To find the total cost of electricity, multiply the cost per unit by the total units, then convert the product from cents to dollars.
First, start by ignoring the decimal points and multiply them normally
Next, count how many place values there are from the decimal point to the right of the two factors.
There is a total of 2 place value movements to the right of the decimal point.
Get the final product by moving the decimal point of the initial product 2 places to the left.
Finally, to convert cents into dollars, move the decimal point 2 places to the left
Therefore, the total cost of electricity for 500 units is $102.60.
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Question 2 of 3
Each can of paint costs $35.25. If 6 cans are needed to paint the whole area, what will the total cost be?
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First, list down the given values in the problem.
Price per can of paint: $35.25
Cans of paint needed: 6
To find the total cost for the cans of paint, multiply the price per can of paint by the amount of cans of paint needed.
Start by ignoring the decimal points and multiply them normally
Next, count how many place values there are from the decimal point to the right of the two factors.
There are a total of 2 place value movements to the right of the decimal point.
Get the final product by moving the decimal point of the initial product 2 places to the left.
Therefore, 6 cans of paint will cost $211.50
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Question 3 of 3
On a map, the distance between two locations is 5.3 cm. If the scale of the map is 1 cm:100 km, what is the actual distance between the two locations?
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First, list down the given values in the problem.
Distance between the locations: 5.3 cm
Scale on map: 1 cm:100 km
To find actual distance of the location, multiply the distance between the locations by the actual size on the scale, which is 100.
Since the decimal is being multiplied by 100, simply move the decimal point 2 places to the right.
Therefore, the actual distance between the two locations is 530 km.
