Class lecture from Tuesday, September 27. Word Problems.

1. GED Practice Divisibility Rules The divisibility rules make math easier. Did you ever wonder how people could tell if something was divisible by a number just by looking at it? Divisibility Rules will help you be more awesome and it will make reducing fractions much easier.

2. Three A number is divisible by three if the sum of the digits adds up to a multiple of three. Example 423 is divisible by three because 4 + 2 + 3 = 9. Since 9 is a multiple of three, or is divisible by three, then 423 is divisible by three.

3. Four A number formed by the two rightmost digits is divisible by 4. Example 128 is divisible by four because 28 is evenly divisibly by 4.

4. Check Which numbers are evenly divisible by three? 468 725 65232 8864233

5. Check Which numbers are evenly divisible by four? 3162 2588 120457812 67828

6. Word Problems Word problems often scare people, but they should not. There is no secret to solving, just strategy.

7. Strategy 1. Understand the question. 2. Decide what information you need to answer the question. 3. Choose the arithmetic operation(s). 4. Solve the problem and check your work. 5. Make sure that you answered the question and that your answer makes sense.

8. Example Laura works at a part-time job 20 hours a week. She makes $9 an hour. How much money does she make a year from this job? Step 1: Question: How much money does she make a year from this job? Step 2: Info: 20 hours/week, $9/ hour, 52 weeks a year Step 3: Arithmetic: multiply Step 4: Solve: 20 hours x $9 an hour x 52 weeks a year Step 5: Make sense? $9360

9. Homework Take out your HW and do the following to review these steps: Underline the question Circle key words Box important information Draw the arithmetic signs next to the problem Check your answer- Does it make sense?