## PCSR 2017 CIVIL SERVICE EXAM REVIEW GUIDE 10

This is the tenth review guide for the Philippine Civil Service Review. In this guide, we will learn about solving equations. We will also learn new sets of words in our Vocabulary review as well as a spelling quiz.

Week 10: June 4 – June 10

PART I: MATH

A. Videos

Lesson on Equations

B. Articles

PART II: ENGLISH

Vocabulary

Civil Service Exam Vocabulary Quiz 10

Spelling

Civil Service Exam Spelling Quiz 10

## Solutions to Subtracting Integers Practice Test

Blow are the solutions to the Civil Service Exam subtracting integers practice test.  As I have mentioned before, you do not have to memorize the rules of subtraction. All you have to do is convert it to addition. We can do this by converting a subtraction of integers problem  to addition of integers by changing the signs: minus “-: to plus negative “+ (-“  and minus negative “– –” or “– (-” to plus “+“. Observe how the subtraction problems are converted into addition problems in the solutions below. If you have any questions, please use the comment box below.

1. 12 23 = 12 + (-23) = -11

2. -21 – (-4) = -21 + 4 = -17

3. 17 – (-36) = 17 + 36 = 53

4. -18 13 = -18 + (-13) =-31

5. 22 35 = 22 + (-35) = -13

6. -34 – (-21) = -34 + 21 = – 13

7. 29 – (-6) = 29 + 6 = 35

8. 98 – 14 = 84 (no need to change signs, this is ordinary subtraction since the minuend is larger than the subtrahend).

9. -87 53 = -87 + (-53) = -140

10. 63 92 = 63 + (-92) = -29

In the next post, we are going to discuss about multiplication and division of integers.