ISEE Middle Level Math : ISEE Middle Level (grades 7-8) Mathematics Achievement

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

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Example Questions

Example Question #1321 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Which of the following is the difference of nine tenths and nineteen thousandths?

Possible Answers:

Correct answer:

Explanation:

Nine tenths is equal to 0.9; nineteen thousandths is equal to 0.019. Subtract them, rewriting 0.9 as 0.900:

     

     

Example Question #1322 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Which of the following is the difference of two-thirds and one-fifth?

Possible Answers:

Correct answer:

Explanation:

Since , express each fraction as its equivalent in fifteenths, and subtract the numerators, as follows:

Example Question #1323 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Subtract:

Possible Answers:

Correct answer:

Explanation:

Subtract the numerators and leave the denominators the same:

Answer:

Example Question #1324 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Subtract:

Possible Answers:

Correct answer:

Explanation:

Subtract the numerators and leave the denominators the same:

Answer: 

Example Question #437 : Numbers And Operations

The time is now 2:17 AM. What time was it four hours and thirty-six minutes ago?

Possible Answers:

Correct answer:

Explanation:

Two hours and seventeen minutes have elapsed since midnight. Since four hours and thirty-six minutes make a greater quantity, we need to look at this as fourteen hours and seventeen minutes having elapsed since noon. 

Change both to minutes as follows:

14 hours 17 minutes:

 minutes

4 hours 36 minutes:

 minutes

Subtract these quantities:

 minutes have elapsed since noon. 581 minutes is equal to

 hours, or 9 hours 41 minutes after noon, so the time was 9:41 PM.

Example Question #1325 : Isee Middle Level (Grades 7 8) Mathematics Achievement

Subtract the following fractions:

Possible Answers:

Correct answer:

Explanation:

Subtract the following fractions:

To solve this problem, we need to find a common denominator. 6 will work, because both 6 and 3 fit evenly into 6.

We need to change "two-thirds" into sixths. to do so, multiply the top and bottom of the term by 2. Then subtract by taking 5-4 and keeping the denominator.

So our answer becomes:

Example Question #291 : Fractions

Solve the following problem:

Possible Answers:

Correct answer:

Explanation:

When subtracting fractions, we just worry about the numerators, when all of the denominators are the same, so we can subtract as usual, 

.

This gives us the answer 

,

which can then be reduced to 

.

Example Question #395 : Arithmetic

Add:

Possible Answers:

Correct answer:

Explanation:

Rewrite using the lowest comon denominator. Since :

Example Question #33 : Fractions

Solve:

Possible Answers:

Correct answer:

Explanation:

The least common multiple of 2 and 9 is 18.

Example Question #396 : Arithmetic

Possible Answers:

Correct answer:

Explanation:

Add the numerators:

 

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