How to subtract - ISEE Lower Level Quantitative Reasoning
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To subtract fractions, we first see if they have the same denominators. In this case, the two fractions have the same denominator (5).
Then we subtract the second numerator from the first numerator: 
.
We keep the original denominator and get 
. Do not subtract the denominators.
To subtract fractions, we first see if they have the same denominators. In this case, the two fractions have the same denominator (5).
Then we subtract the second numerator from the first numerator:
We keep the original denominator and get
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Subtract the numerators and keep the denominators the same.
The correct answer is 
or 
.
Subtract the numerators and keep the denominators the same.
The correct answer is
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Sam bought a video game and an MP3 player from the store with money from his birthday. He spent $264.21, including tax. The following day, he had to return the video game. His new total spent was $197.89 for the MP3 player. When he returned the video game, how much money did he get back?
Sam bought a video game and an MP3 player from the store with money from his birthday. He spent $264.21, including tax. The following day, he had to return the video game. His new total spent was $197.89 for the MP3 player. When he returned the video game, how much money did he get back?
To find the difference, you must subtract. Line up the numbers vertically. Remember to use the rules of borrowing to subtract.
Sam got $66.32 back when he returned the video game.
To find the difference, you must subtract. Line up the numbers vertically. Remember to use the rules of borrowing to subtract.
Sam got $66.32 back when he returned the video game.
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One coin has a thickness of 
inches, while another coin has a thickness of 
inches. How much thicker is the second coin?
One coin has a thickness of
To solve this problem, we have to subtract the smaller thickness from the larger thickness 
.
When subtracting fractions, we must find a common denominator (in this case, 12) and then change the numerators accordingly 
.
The answer is therefore 
To solve this problem, we have to subtract the smaller thickness from the larger thickness
When subtracting fractions, we must find a common denominator (in this case, 12) and then change the numerators accordingly
The answer is therefore
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Give the difference of 6 and 0.77.
Give the difference of 6 and 0.77.
Write the two numbers vertically with decimal points aligned, adding a decimal point and two zeroes to the 6, and subtract:
Write the two numbers vertically with decimal points aligned, adding a decimal point and two zeroes to the 6, and subtract:
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Subtract:
Subtract:
One foot is equal to 12 inches, so:
In this equivalent problem, subtract feet and inches separately:
One foot is equal to 12 inches, so:
In this equivalent problem, subtract feet and inches separately:
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Subtract:
Subtract:
One foot is equal to 12 inches, so:
In this equivalent problem, subtract feet and inches separately:
One foot is equal to 12 inches, so:
In this equivalent problem, subtract feet and inches separately:
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Janet wins a bag of 60 marbles and wants to give some to Julie so that each girl will have the same number of marbles. Julie already has 40 marbles; Janet already has 30. How many of the 60 marbles will Janet keep?
Janet wins a bag of 60 marbles and wants to give some to Julie so that each girl will have the same number of marbles. Julie already has 40 marbles; Janet already has 30. How many of the 60 marbles will Janet keep?
After Janet wins the 60 marbles, the girls together own 
marbles. Each should therefore own half this, or 
marbles. Since Janet has 30 marbles already, she will keep 
marbles.
After Janet wins the 60 marbles, the girls together own
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Karen wins a bag of 100 marbles and wants to give some to her sister Kay so that each girl will have the same number of marbles. Karen already has 71 marbles; Kay already has 51. How many of the 100 marbles will Karen keep?
Karen wins a bag of 100 marbles and wants to give some to her sister Kay so that each girl will have the same number of marbles. Karen already has 71 marbles; Kay already has 51. How many of the 100 marbles will Karen keep?
After Janet wins the 100 marbles, the girls together own 
marbles. Each should therefore own half this, or 
marbles. Since Karen owns 71 marbles already, she will keep 
marbles.
After Janet wins the 100 marbles, the girls together own
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The time is now 8:08 PM. What time was it three hours and seventeen minutes ago?
The time is now 8:08 PM. What time was it three hours and seventeen minutes ago?
You can subtract three hours and seventeen minutes from 8:08 PM as follows:
However, since 17 minutes is greater than 8 minutes, the time can be rewritten as
Now subtract:
That is, 4:51 PM.
You can subtract three hours and seventeen minutes from 8:08 PM as follows:
However, since 17 minutes is greater than 8 minutes, the time can be rewritten as
Now subtract:
That is, 4:51 PM.
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Subtract:
Subtract:
One pound is equal to 16 inches, so:
In this equivalent problem, subtract pounds and ounces separately:
One pound is equal to 16 inches, so:
In this equivalent problem, subtract pounds and ounces separately:
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Give the difference of 7.4 and 0.134.
Give the difference of 7.4 and 0.134.
Write the two numbers vertically, adding two zeroes to the 7.4, and subtract:
Write the two numbers vertically, adding two zeroes to the 7.4, and subtract:
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Subtract:
Subtract:
One foot is equal to 12 inches, so:
We can now subtract inches: 
inches, which can be converted to feet by dividing by 12:
, so
41 inches is equivalent to 3 feet, 5 inches.
One foot is equal to 12 inches, so:
We can now subtract inches:
41 inches is equivalent to 3 feet, 5 inches.
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Evaluate 
.
Evaluate
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A roundtrip plane ticket from Los Angeles to Las Vegas costs $220. However, a one way ticket to Las Vegas costs $120 and a one way return flight costs $95 dollars. Which is travel method is cheaper?
A roundtrip plane ticket from Los Angeles to Las Vegas costs $220. However, a one way ticket to Las Vegas costs $120 and a one way return flight costs $95 dollars. Which is travel method is cheaper?
If a one way ticket to Las Vegas costs $120 and a one way return flight costs $95 dollars, the total cost is $115.
If a roundtrip plane ticket from Los Angeles to Las Vegas costs $220, the one way tickets are $5 cheaper.
If a one way ticket to Las Vegas costs $120 and a one way return flight costs $95 dollars, the total cost is $115.
If a roundtrip plane ticket from Los Angeles to Las Vegas costs $220, the one way tickets are $5 cheaper.
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Martha baked a batch of 24 cookies and gave one fourth to her sister. How many cookies does she have left?
Martha baked a batch of 24 cookies and gave one fourth to her sister. How many cookies does she have left?
If Martha baked a batch of 24 cookies and gave one fourth to her sister, she gave 
cookies to her sister.
Given that 
, the number of remaining cookies is 18.
If Martha baked a batch of 24 cookies and gave one fourth to her sister, she gave
Given that
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What is the value of the expression below?
What is the value of the expression below?
First find a common denominator:
The expression above can then be converted:
Thus, 
is the correct answer.
First find a common denominator:
The expression above can then be converted:
Thus,
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If a is even and b is odd, which of the following statements MUST ALWAYS be true about the value of 
?
If a is even and b is odd, which of the following statements MUST ALWAYS be true about the value of
Whenever an odd number is added or subtracted to or from an even number, the result MUST be odd. Therefore, the correct answer is "c is odd."
While subtracting an odd number from an even number CAN result in a positive or negative number, it will NOT always have that result.
Whenever an odd number is added or subtracted to or from an even number, the result MUST be odd. Therefore, the correct answer is "c is odd."
While subtracting an odd number from an even number CAN result in a positive or negative number, it will NOT always have that result.
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If an angle is equal to 145 degrees, how many more degrees is it than a right angle?
If an angle is equal to 145 degrees, how many more degrees is it than a right angle?
If an angle is equal to 145 degrees, it is 55 degrees more than a right angle. This is because there are 90 degrees in a right angle, and 
. Thus, 55 is the correct answer.
If an angle is equal to 145 degrees, it is 55 degrees more than a right angle. This is because there are 90 degrees in a right angle, and
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On the morning of December 24th, a tree lot had 
trees left to sell. By the end of the day, the lot only had 
trees left. How many trees were sold?
On the morning of December 24th, a tree lot had
This is a subtraction problem because we want to know how many trees were taken away, or sold, from the total. We take the number of trees they started with, and then subtract the number of trees they have left to find out how many they sold. 
.
This is a subtraction problem because we want to know how many trees were taken away, or sold, from the total. We take the number of trees they started with, and then subtract the number of trees they have left to find out how many they sold.
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