Numbers and Operations - ISEE Lower Level (grades 5-6) Mathematics Achievement

The key word, "approximately," indicates that we must round each of these values. Let's round to the nearest tens place because each of our answer choices is rounded to the tens place.

Shoes cost $42.64.

$42.64 rounded (down) to the nearest tens place is $40.

Pants cost $37.99.

$37.99 rounded (up) to the nearest tens place is $40.

A shirt costs $21.34.

$21.34 rounded (down) to the nearest tens place is $20.

Let's add up our estimated prices.

$40 + $40 + $20 =

$100.

The flat fee for the shoes will only be paid once since the shoes will be used for all four games. The cost per game will be paid each time one game finishes and a new one is started.

To calculate her cost add the fee for the shoes and the fee for each game played. That would be $8 (shoes) + $10.50 (game 1) + $10.50 (game 2) + $10.50 (game 3) + $10.50 (game 4) = $50 (total cost).

Laura had $50 with her so there was enough money and nothing left over when she left the bowling alley.

Add the first two numbers as follows:

Now add this sum to the third number as follows:

Add the first two numbers as follows:

Now add this sum to the third number as follows:

When adding fractions, you must first make sure that the denominators are equal. If they are not equal, then you must make them equal by finding the LCD (lowest common denominator). In this case the LCD is 15. Now set up the new equation:

Then add the numerators to get:

Show as a mixed fraction:

Since we're looking for an approximate value, we need to round our numbers up. Adding the three items gives a total of $60.74, so at least $61 is needed - thus $61 is the correct answer.

First, add up all of the values:

Then, decide which of the answer choices approximates this value. Our answer is between and .

Another way to solve this problem is to round the four values to their nearest whole numbers and then sum those rounded values:

When adding two fractions, you first need to make their denominators match. Find the least common multiple of the two denominators, then convert both fractions so that they both share that denominator. The least common multiple of and is , so that will be the new denominator. Convert into by multiplying its numerator and denominator by , and convert into by multiplying its numerator and denominator by . Then add together the converted fractions. , so is the correct answer.

Round each number to the nearest whole number:

Add them together:

Therefore, 15 is a valid approximation of the problem. The exact answer is:

To solve this problem, one should round either to the tenths place, or to the nearest dollar. can be rounded to , to , to , and to . When one adds up the estimated costs, it yields about .

In this problem, the costs of the items can be rounded to either the nearest dollar, or the nearest ten cents.

and can be rounded to and , respectively.

can be rounded to , and can be rounded to .

When the new, estimated costs of the items are added, the sum is , which is between and dollars.

To estimate, you must first round the numbers given. Round 1389 to 1400. Then, round 592 to 600. Combine 1400 and 600 to get 2000.

First, find a common denominator. For these two fractions, it is 20. Then, change each fraction to reflect that new denominator. becomes . becomes . The next step is to add the numerators, which is 17. Remember, when adding fractions, we only add the numerators. Thus, your answer is

To determine the standard form for five hundred twenty-two thousand twenty, it is best to take it step by step:

• five hundred thousand =
• twenty-two thousand =
• twenty =

The final answer can be found by adding together these parts.

The numbers in the set are all odd, meaning that they are not divisble by 2.

While the numbers in the set increase by 4 sequentially, they are not divisible by 4, and therefore are not multiples of 4.

Thus, the best answer is that they are all odd.

Additionally, the numbers are not prime because 9 and 21 are both divisible by 3.

To find the total number of cookies, add each person's cookies together.

To solve, you will need to get alone on the left side of the equation. Do this by dividing both sides by 2.

The left side cancels.

Reduce the right side.

Given that Jill's class starts at 8:00 and that it takes her 15 minutes to walk there, she must leave at 7:45. Since she woke up an hour before class starts, at 7 am, this means that she must leave in 45 minutes. Therefore, the correct answer is:

She must leave in 45 minutes in order to leave at 7:45.

To simplify, the first step is to reorder the terms and add the like variables together.

This gives us , which is therefore the correct answer.