ISEE Lower Level Math : How to subtract

Study concepts, example questions & explanations for ISEE Lower Level Math

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Example Questions

Example Question #17 : Money And Time

Larry owes Jon $5.75. If Larry gives Jon a $10 bill and Jon gives him change in quarters, how many quarters does Jon give to Larry?

Possible Answers:

Correct answer:

Explanation:

If Larry gives Jon a $10 bill to pay him back for $5.75, Jon will need to give Larry back .

If Jon gives the change in quarters, he will give him  quarters.

 

 

Example Question #323 : Numbers And Operations

If Eliza buys a book for  dollars and then sells it for  dollars, how much profit does she make (in dollars)?

Possible Answers:

Correct answer:

Explanation:

If Eliza buys a book for  dollars and then sells it for  dollars, her profit will be equal to the selling price, minus the initial cost of the book. 

This results in . Therefore,  dollars is the correct answer. 

Example Question #11 : How To Subtract

What is the solution to the expression below?

Possible Answers:

Correct answer:

Explanation:

The first step to solve for  is to convert the fractions into a form in which they share a least common denominator. The least common denominator of  and  is . Therefore, the expression should be rewritten as:

This results in , the correct answer. 

Example Question #12 : How To Subtract

What is the value of the expression below, simplified?

Possible Answers:

Correct answer:

Explanation:

The first step is the reduce the fractions in the expression. 

Next, we need to convert each of the fractions to a form in which they both have the same denominator. We can do this by cross-multiplying:

Example Question #14 : How To Subtract

If Greg's older brother, Boris, is five years older than Greg but three years younger than their oldest brother, Jerry, how old is Greg if Jerry is eighteen years old?

Possible Answers:

Correct answer:

Explanation:

Given that Boris is  years younger than Jerry, Boris is .

Given that Greg is  years younger than Boris, Greg will be  years old. 

Therefore,  is the correct answer. 

Example Question #15 : How To Subtract

Lisa is reading a book that is  pages long. She has one-sixth of the book to read before she is finished. How many pages has she read so far?

Possible Answers:

Correct answer:

Explanation:

One-sixth of  is . Therefore, if Lisa has  more pages to read before she is finished with the book, the number of pages that she has read so far is equal to . Therefore,  is the correct answer.

Example Question #13 : How To Subtract

Maria has a playlist of eighteen songs. She deletes half of the songs and then adds three new songs. If she listens to the first  of the new playlist, how many songs will she have listened to?

Possible Answers:

Correct answer:

Explanation:

If Maria has a playlist of  songs and deletes half of them, this leaves  remaining songs on the playlist. If she then adds  new songs, there will be  songs on the play list. If she listens to the first  of the new playlist, she will have listened to  songs. This is because  is equal to  and .

Example Question #12 : How To Subtract

Alex and Andrew are brothers who want to get their mother a present that costs $350. Their father gives them $100 to help them pay for it, and their sister gives them another $100 to help them pay for it. If Alex and Andrew pay for the rest of the present in equal parts, how much money (in dollars) must each one of them pay?

Possible Answers:

Correct answer:

Explanation:

If Alex and Andrew want to get their mother a present that costs $350, and their father gives them $100 to help them pay for it, and their sister gives them another $100 to help them pay for it, they will have to pay the remaining $150. If Alex and Andrew pay for the rest of the present, they will each have to pay $75 each, because $150 divided by 2 is $75. 

Example Question #13 : How To Subtract

What is the difference between and ?

Possible Answers:

Correct answer:

Explanation:

Finding the difference means subtracting the smaller number from the larger number. First line up the decimal points, then subtract. You'll need to borrow to get the right answer.

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Example Question #14 : How To Subtract

Evaluate:

Possible Answers:

Correct answer:

Explanation:

The first step to solving this problem is to find the difference between: 



Then find the sum of  which equals a total of 

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