GED Skill: Adding and Subtracting Decimals
Adding and subtracting decimals is similar to adding and subtracting whole numbers. However, when you add or subtract decimals, it is important that you line up the decimal points. Once your numbers are lined up properly, you can add or subtract just like you would whole numbers.
Problem: Sally went to the store and purchased a can of soda for 75 cents and a bag of chips for $3.99. She gave the cashier a $10 bill. How much change will Sally get back?
Answer: $00.75 + $3.99 = $4.74
$10.00 - $4.74 = $5.26(change)
Tuesday, January 01, 2008
Tuesday, October 30, 2007
GED Math Help: percents
To rent a hall for a party reception (for 1 evening) costs $225. The Hall is also charging $25.50 per adult and $19.95 per child for the meal and reception. Gratuity is 15% of total costs. If 125 adults and 32 children attending the party, what is the total cost.... including gratuity?
Answer: Set up the problem as follows:
First part: (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
Second part: 15% of (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
.
Find the answers to part one and two, and then add them together.
.
Part one- hall and meals: $225 + (125 x $25.50) + (32 x $19.95) = $4050.90.
Part two- gratutity: .15 x $4050.90 = $607.34
.
Total cost: $4050.90 + $607.34 = $4658.24
Have you recently held a reception? How did you calculate costs?
To rent a hall for a party reception (for 1 evening) costs $225. The Hall is also charging $25.50 per adult and $19.95 per child for the meal and reception. Gratuity is 15% of total costs. If 125 adults and 32 children attending the party, what is the total cost.... including gratuity?
Answer: Set up the problem as follows:
First part: (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
Second part: 15% of (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
.
Find the answers to part one and two, and then add them together.
.
Part one- hall and meals: $225 + (125 x $25.50) + (32 x $19.95) = $4050.90.
Part two- gratutity: .15 x $4050.90 = $607.34
.
Total cost: $4050.90 + $607.34 = $4658.24
Have you recently held a reception? How did you calculate costs?
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