In this lesson we will review for the unit assessment and learn test taking strategies.
Math Warm-up Double each of the following. Do them mentally. 1.43 2.27 3.85 (Pause Lesson to work)
Math Warm-up - ANSWER Double each of the following. Do them mentally. 1.43 86 2.27 54 3.85 170 (Pause Lesson to work)
In this unit you learned about fractions. Today we will review all that you have learned, as well as go over test taking strategies.
Vocabulary Review fraction – a symbol, such as ¾, used to describe one or more parts of a whole that is divided into equal parts. A fraction can name a part of a whole, a part of a set, a location on a number line, or a division of whole numbers.
Vocabulary Review numerator - the number above the fraction bar in a fraction denominator - the number below the fraction bar in a fraction 1212 denominator numerator
Vocabulary Review dividend - the number to be divided. 24 ÷ 4 = 6 divisor - the number that a dividend is divided by. 24 ÷ 4 = 6
Vocabulary Review quotient - the number that is the result of dividing. 24 ÷ 4 = 6 6 is the QUOTIENT!
Vocabulary Review Equivalent fractions : have the same value, even though they may look different. Unlike denominator: Unlike denominator is the bottom number in a fraction that is not the same as another fraction. Common denominator: Denominator s must be the same to be common.
Vocabulary Review Greatest Common Factor: The greatest number that is a factor of 2 or more given numbers. Example: 18=2 x 3 x 3 24=2 x 2 x 2 x3 Find the prime numbers! Benchmark fraction: Common fractions used for estimating, such as ½, ¼, ⅓, ⅔, & ¾.
Vocabulary Review Multiple: a number that contains another number repeatedly without a remainder, example 5 is a multiple of 25. Prime: a number that can be divided evenly only by 1 and itself. Composite: a number that can be divided evenly by numbers other than 1 or itself.
Least Common Denominator: (LCD), The least common multiple of the denominators of two or more fractions. Vocabulary Review Least Common Multiple: (LCM), the least number that is a common multiple of two or more numbers.
Vocabulary Review mixed number – a whole number and a fraction Ex.
Vocabulary Review improper fraction – a fraction whose numerator is greater than or equal to its denominator (the fraction is 1 whole or more) Ex.
Write 2 equivalent fractions. Use multiplication for one and division for the other.
You can make equivalent fractions by multiplying or dividing both top and bottom by the same amount. You only multiply or divide, never add or subtract, to get an equivalent fraction. Only divide when the top and bottom would still be whole numbers.
Simplifying fractions, also known as, reducing or putting into lowest terms, means to make the fraction as simple as possible. They are still the same or equivalent but written with a different fraction name, as ½ = 2/4. To simplify a fraction, divide the top and bottom by the highest number that can divide into both numbers equally.
Fractions in Simplest Form If a number is a factor of two numbers, it is called a common factor. The greatest common factor (GCF), of 2 numbers is the greatest or largest number that is a factor of both numbers. 4 was the greatest common factor for both 12 & 20. 2 is a factor but we still did NOT have simplest form until we divided it by 4 (the largest factor).
Simplify the fraction. common factor = common multiple 4 ÷ 2 = 2 10 2 5 3 (Is this fraction in simplest form?) 5 Can the numerator & denomInator be divided by a whole number? Simplest Form YES (It was not in simplest form as it could be divided by ‘2’ for both the numerator & denominator.) NO
Greatest Common Factor The greatest common factor (GCF), of 2 numbers: 20 & 30 20: 1, 2, 4, 5, 10, 20 30: 1, 2, 3, 5, 6, 10, 15, 30 The GCF of 20 & 30 is 10. Or 10 is a multiple of both numbers.
When you don’t know the equivalent fraction to use when adding or subtracting fractions with unlike denominators you will have to change one or all the fractions to share a common denominator. Find the common denominator we need to find the least common multiple or the least common denominator to do this.
1.Find the common denominator This just means all the fractions have the same denominator. Why is this important to adding and subtracting fractions? Before you can do these operations the fractions must share a common denominator.
2. Find the least common denominator. This is the same as finding the least common multiple of the denominators. As ¼ =2/8 (4 is a multiple of 8) Find the LEAST (smallest) common multiples of both denominators to see what can be the shared denominator.
Example of Least Common Multiple 1/3 List the multiples of 3 : 3, 6, 9, 12, 15, 1/6 List the multiples 6 : 6, 12, 18, 24, … The least common multiple is 6. Now what do you do?
Example of Least Common Multiple 1/3 List the multiples of 3 : 3, 6, 9, 12, 15, 1/6 List the multiples 6 : 6, 12, 18, 24, … The least common multiple is 6. Now what do you do? 1 = 2 (What was multiplied by both the 3 6 numerator and denominator to get 2/6? 2 was.) 1x 2 =2 3x 2 = 6
What Did We Do? The trick was to list the multiples of each denominator, then find the Least Common Multiple! Easy as....
The Steps! Here are the steps to follow: Find the Least Common Multiple of the denominators (which is called the Least Common Denominator ). Change each fraction (using equivalent fractions)equivalent fractions to make their denominators the same as the least common denominator. Then you add (or subtract) the fractions, as you wish!
Lesson Review When working on Word Problems: Read each problem twice, twice. Underline key words. Underline the information you need to solve a problem. Circle any data that is provided. Choose your solution strategy. Solve and show your work. Check your answer.
Hoping to be named Salesperson of the Month, Braden called the names from 2 2/5 pages of the phone book last week. This week, he called the people listed on another 5 2/5 pages of the same phone book. How many pages worth of people did Braden call in all? In your Math Notebook Independent Practice
Test Taking Strategies (Write these in your Math Notebook) Read each problem twice. Underline key words. Underline the information you need to solve a problem. Circle any data that is provided.
Test Taking Strategies (Write these in your Math Notebook) Solve the problem. Show your work as you solve the problem. Check your work. Use estimation to check if your answer is reasonable.
Today you reviewed for the unit assessment and learned about test taking strategies. Good Work with this lesson.