UNIT 3 ESTIMATIONS WITH DECIMALS AND PERCENTS Estimation

UNIT 3: ESTIMATIONS WITH DECIMALS AND PERCENTS. Estimation: an approximate calculation used to determine a reasonable solution. Estimate: the act of calculating a reasonable solution. For example: a car gas tank holds 20 g of fuel. If a gallon of gas cost $2. 89, then it will cost approximately $60 to fill the tank. [20 x 3 = 60 so it will cost about $60] What other math skill did we use here? Is my answer reasonable? Reasonable: logical or sensible, not foolish. For example: an $87. 48 restaurant bill is split equally between 5 friends. Excluding tip, about how much does each person pay? [round $87. 48 to $90 and divide by 5 so it will cost each friend about $18. ] reasonable?

UNIT 3 continued. Addends: any one or two or more numbers that are to be added together. For example: 12 + 5 + 10 = 27 12, 5, 10 are the addends and 27 is the __? Example 2: 24 + 24 = 96 24, 24, 24 are the addends and 96 is __? Discount: a reduction in price. Example: A car originally priced at $32, 497, now priced at $30, 000 has been discounted by $2, 497 is the discount. Original Price: the price or cost of an item before any discount or mark down is applied. Example: the car’s price of $32, 497 is the original price. Sale Price: the reduced price of an item. The cost of an item after the discount has been subtracted. Example: from example 1: The sale price of the car is $30, 000.