Transcript Fractions
Click onto a subject • • • • • • What is a Fraction Practice counting Fractions Fraction of a whole: game Numerator and Denominator Adding Fractions Subtracting Fractions What is a fraction? • It is a part of a whole: = A whole bar = 1 A complete bar = 1/2 of the bar is yellow = 1/2 of the bar is blue = 1/3 of the bar is yellow. 1/3 of the bar is red. 1/3 of the bar is blue. There are 4 parts to this whole bar. • 1/4 of the bar is yellow and • 3/4 of the bar is blue. More Fractions: count how many bars there are across each row and that will give you how many parts there are in the whole bar. Each part counts as 1 section of the whole bar! 1/1 1/10 1/10 1/3 1/3 1/3 1/5 1/5 1/5 1/5 1/5 1/7 1/7 1/7 1/7 1/7 1/7 1/7 1/10 1/10 1/10 1/10 1/10 1/10 1/10 1/10 Identifying parts of the fraction • The top # in the fraction is called a numerator, and the bottom of the fraction is called a denominator. • Example: 3/4, 3 is on top, it is the numerator 4 is on bottom, it is the denominator. (helpful hint: I know d is the first letter in down, this tells me the denominator is the number on the bottom) Identifying Fraction Parts • Now you click on the correct answer to these questions. 1. What number in the fraction 4/5 is the denominator? 10 6 3 5 2. What number in the fraction 4/5 is the numerator? 4 5 10 6 More of the numerator and denominator • Identify the numerator in 3/9. 3 9 8 39 • Identify the denominator in 5/8. 5 8 4 58 • Identify the denominator in 2/3. 2 3 4 23 Fraction of a whole: Now you try and see if you can give me the correct answer to these problems! Use your mouse to click on the correct answer! 1. How many parts are there in this whole bar? 6 10 5 8 2. What fraction is colored yellow? (hint, how many parts of the whole) 2/5 4/5 5/5 1/2 Lets try another problem! 1. How many parts are there in the whole bar? 9 11 8 5 2 What fractions are colored in yellow? 1/8 5/8 8/8 3/8 Your doing great! How about this problem? 1. What fraction of the bar is yellow? 1/7 3/5 2/6 2/7 2. What fraction of the bar is red? 3/7 0/7 7/7 1/7 3. What fraction of the bar is blue? 1 5/7 4/4 2/7 This one is a little tricky! 1. What fraction of the bars are yellow? (hint: this whole bar has 2 rows) 0/10 5/10 10/10 4/10 2. What fraction of the bars are blue? 6/10 1/10 5/10 10 One more and you can go practice on the internet! 1. What 6/6 2. What 2 3. What 3 fraction of the bar is yellow? 6 1 1/6 fraction of the bar is red? 2/2 21 2/6 fraction of the bar is blue? 6 33 3/6 Adding Fractions: • Adding fractions is very easy. Just take the numerator (Top number or first number) and add them together, and keep the denominator (or second number) the same! Example: 1/5 + 2/5 = 3/5 ¼ + ¼ = 2/4 1/6 + 4/6 = 5/6 Now you try this practice worksheet on a piece of paper and click on the word answer when you are done! 1. 1/8 + 1/8 = 2. 2/6 + 3/6 = 3. 1/3 + 1/3 = 4. 5/9 + 1/9 = 5. 1/7 +2/7 = answers ANSWERS TO ADDITION 1. 2. 3. 4. 5. 1/8 + 1/8 = 2/6 + 3/6 = 1/3 + 1/3 = 5/9 + 1/9 = 1/7 + 2/7 = 2/8 5/6 2/3 6/9 3/7 SUBTRATING FRACTIONS • Subtracting fractions are just as easy as adding. Just subtract the numerator (top or first numbers), and keep the denominator the same (bottom or second numbers). Example: 4/5 – 1/5 = 3/5 3/6 – 2/6 = 1/6 6/8 – 2/8 = 4/8 Now you try this practice on a piece of paper and when you are done click on answers to check your answers! 1. 4/4 – 2. 5/6 – 3. 8/9 – 4. 5/7 – 5. 4/5 – answer 1/4 = 2/6 = 1/9 = 2/7 = 1/5 = ANSWERS TO SUBTRACTION 1. 4/4 – 1/4 = 3/4 2. 5/6 – 2/6 = 3/6 3. 8/9 – 1/9 = 7/9 4. 5/7 – 2/7 = 3/7 5. 4/5 – 1/5 = 3/5 CONGRATULATIONS, GO TO THE NEXT SLIDE! Okay, go to the internet, choose a website to click onto and have fun! • http://www.coolmath4kids.com/ click on web address above This is a cool website with a lot of interactive things for you to do! • www.aaamath.com/fra.html click on web address above This a website to practice and further you fraction skills • Presented by: Colleen NishikawaAlanis • Instuctor: Dr. Ali Rezaei • ETEC-444 • Wednesday • 9:00 a.m. – 12:45 Many Thanks Professor for your patients and faith!