Page 169 - ABCTE Study Guide_Neat

B x = –60

C x = 22

D x = 60

Answer

The correct answer is C. Find the difference between 41 and 19, since the numbers have opposite signs.
The difference is 22. The larger absolute value is 41, so the answer is positive.

Review

• If unclear about operations for integers, go back and review the specifics on how to add,
subtract, multiply, and divide integers.
• Remember to have a common denominator when you are adding and subtracting
fractions and mixed numbers.

Fractions

Lesson Objective

The following section will allow you to reacquaint yourself with fractions and the way they are added,
subtracted, multiplied, and divided.

Previously Covered

In the sections above, we reviewed the basic sets of numbers. We also brushed up on prime and
composite numbers.

Adding and Subtracting Fractions

The key to adding and subtracting fractions, you'll recall, is finding a common denominator. Let's move
right on to mixed numbers--that'll serve as a fractions refresher as well.

Adding and Subtracting Mixed Numbers

For addition and subtraction with mixed numbers, it is easiest to leave the numbers as mixed numbers.
Many people were taught to convert them into improper fractions, which is necessary when multiplying
and dividing but just complicates everything for addition and subtraction.

You still need a common denominator for the fractions. At the end of the problem, you may need to
convert the answer into a proper mixed number, so that you don't have a whole number combined with an
improper fraction.

(For example, you would change into )