Concept explainers
Shopping provides a really good example of the value of estimation. Most people have a rough idea of how much they have to spend in a given shopping trip. While you could pull out the old cell phone calculator and add up all of your purchases to the cent, who has time for that? Instead, it’s helpful to round prices to easy-to-use numbers and keep rough track of the total. Use this idea to estimate the total cost of each group of items in Questions 3-5. Round each price to the nearest dollar, then try to estimate the overall cost in your head.
Four boxes of mac and cheese (89 cents per box)
A gallon of orange juice ($3.79)
A loaf of bread ($1.79)
Two pounds of ground turkey ($2.97 per pound)
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