GED Math : Numbers and Operations
Study concepts, example questions & explanations for GED Math
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Example Questions
Example Question #81 : Numbers And Operations
Above is the menu for a coffee shop. Today, the shop has a special - buy two iced coffees of any size, and get a third iced coffee of the same size free.
Jerry orders three large iced coffees; Elaine orders two large cappucinos; George orders three butter croissants. List the three customers in ascending order by money spent. (You may ignore tax.)
Jerry, George, Elaine
George, Elaine, Jerry
George, Jerry, Elaine
Elaine, George, Jerry
George, Jerry, Elaine
Since the third large iced coffee is free, Jerry pays for two large iced coffees. He pays
Elaine pays for two large cappucinos. She pays
George pays for three butter croissants. He pays
In ascending order by amount spent, the three are George, Jerry, Elaine.
Example Question #82 : Numbers And Operations
What is 
To convert a mixed number, (whole number and fraction), to an improper fraction, (a fraction whose numerator is greater than the denominator), the steps are as follows:
Multiply the whole number by the denominator of the fraction. In this example the whole number is 17 and the denominator is 5.
Then add the numerator to that total.
This total represents the numerator in the improper fraction. The denominator does not change.
Therefore the improper fraction would be
Example Question #82 : Ged Math
Add:
Convert the decimal to a fraction.
Rewrite the expression.
Identify the least common denominator and convert the fractions.
The answer is:
Example Question #81 : Ged Math
What is a quarter of 492?
To find a fraction of a whole number, we will multiply the fraction by the whole number.
Now, we know a quarter is the same as 
Therefore, a quarter of 492 is 123.
Example Question #82 : Ged Math
What is half of 120?
To find a fraction of a whole number, we will multiply the fraction by the whole number.
Now, we know that half is the same as 
Therefore, half of 120 is 60.
Example Question #82 : Ged Math
What is 
To find a fraction of a number, we will multiply the two together. So, we get
Now, we can simplify before we multiply. The 3 and the 9 can both be divided by 3. So, we get
Now, we simplify.
Therefore, 
Example Question #84 : Ged Math
Multiply the following:
To multiply fractions, we will multiply the numerators together, then we will multiply the denominators together. So, we get
Now, we can simplify to make things easier. The 5 and the 25 can both be divided by 5. So, we get
Example Question #85 : Ged Math
Divide the following:
To divide fractions, we will take the first fraction and multiply by the reciprocal of the second fraction. To find the reciprocal, the numerator becomes the denominator, and the denominator becomes the numerator. In other words, we flip the fraction. So, we get
Example Question #86 : Ged Math
What is a fifth of 300?
To find a fraction of a whole number, we will multiply the fraction by the whole number.
So, we know a fifth is the same as 
Therefore, 
Example Question #82 : Ged Math
What is 
To find a fraction of a whole number, we will multiply the two together. So, we get
Now, we can simplify before we multiply. The 3 and the 144 can both be divided by 3. So, we get
Therefore, 
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