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Welcome to Fractions! – Understanding fractions basics – A fraction represents a part of a whole – Recap: Fractions with 10s and 100s – Remember: 1/10 is one part out of ten, 1/100 is one part out of a hundred – Today’s goal: Add & subtract fractions – We’ll learn to combine and separate these parts – Practice with examples | Begin with a brief review of what fractions are, emphasizing that they represent parts of a whole. Recap the previous lesson on identifying fractions with denominators of 10 and 100, ensuring students are comfortable with these concepts. The main objective for today is to teach students how to add and subtract fractions with denominators of 10 and 100. Use visual aids like pie charts or fraction bars to help students visualize the process. Provide several examples for practice, and encourage students to work through problems step-by-step. For homework, assign problems that require students to find sums and differences of fractions with denominators of 10 and 100.

Understanding Fractions: Parts of a Whole – A fraction shows part of a whole – Numerator & denominator explained – Top number (numerator) & bottom number (denominator) – Fractions with 10 & 100 denominators – Examples: 1/10, 5/10, 25/100, 75/100 – Adding fractions with practice – Learn to add fractions like 3/10 + 7/100 | Begin with the basic definition of a fraction to ensure students understand that it represents a part of a whole. Clarify the roles of the numerator and denominator, with the numerator indicating how many parts we have and the denominator showing the total number of equal parts the whole is divided into. Provide examples of fractions with denominators of 10 and 100 to illustrate the concept. Then, guide students through the process of adding fractions with these denominators, emphasizing the need to convert them to have a common denominator before combining. Use visual aids like pie charts or bar models to help students visualize the fractions and their sums.

Adding Fractions with Common Denominators – Review adding same denominator fractions – Remember, just add the numerators! – Practice with 10s and 100s denominators – Try 1/10 + 3/10 and 7/100 + 12/100 – Sums retain the common denominator – If we add 1/10 + 3/10, the sum is 4/10 – Visual examples for clarity – Use pie charts to show how parts combine | Begin with a quick review of adding fractions with the same denominator, emphasizing that only the numerators change. Provide practice examples using denominators of 10 and 100 to solidify the concept. Reinforce that when adding fractions with the same denominator, the sum’s denominator remains unchanged. Use visual aids like pie charts or fraction bars to help students visualize how fractions are combined. This will prepare them for understanding more complex fraction addition and ensure they are comfortable with basic operations involving fractions.

Adding Fractions: Common Denominators – Finding a common denominator – Common denominator for 10 and 100 is 100 – Converting to the same denominator – Change 3/10 to 30/100 and 7/100 stays the same – Adding fractions together – Add 30/100 and 7/100 to get 37/100 – Simplifying the result – If the fraction can be reduced, simplify it | This slide introduces the concept of adding fractions with different denominators by finding a common denominator. Start by explaining that a common denominator is a shared multiple of the denominators we have. Use denominators of 10 and 100 as they easily convert to 100. Show how to convert fractions to have the same denominator by multiplying to scale them up. Once the fractions are equivalent, add them together. Finally, teach students how to simplify fractions if possible. Use visual aids like fraction bars or circles to help students understand the concept. Practice with examples and ensure to check for understanding by asking students to solve similar problems.

Subtracting Fractions with Common Denominators – Review fraction subtraction – Subtract numerators, keep the denominator the same – Practice with 10s and 100s – Use examples like 3/10 – 1/10 and 75/100 – 25/100 – Same denominator in differences – The result will have the same denominator as the fractions you subtract – Simplify your answers – Always check if you can make the fraction simpler | Begin with a quick review of how to subtract fractions that have the same denominator by subtracting the numerators and keeping the denominator unchanged. Provide practice problems with denominators of 10 and 100 to solidify this concept. Emphasize that when subtracting fractions with the same denominator, the resulting fraction will also have that denominator. Encourage students to simplify their answers if possible, reinforcing the concept of equivalent fractions. This slide prepares students for dealing with more complex problems involving unlike denominators.

Subtracting Fractions with Different Denominators – Finding a common denominator – Common denominator for 1/10 and 3/100 is 100 – Converting fractions to same denominator – 1/10 becomes 10/100, 3/100 stays the same – Subtracting the fractions – Now subtract: 10/100 – 3/100 = 7/100 – Simplifying the result – If possible, reduce the fraction to simplest form | This slide introduces the concept of subtracting fractions with different denominators by finding a common denominator. Start by explaining that in order to subtract fractions effectively, they must have the same denominator. Use visual aids to show how to convert fractions to have the same denominator, then proceed to subtraction. After obtaining the result, guide students on how to simplify fractions. Provide examples with denominators of 10 and 100, as these are easily relatable to place value concepts already familiar to fourth graders. Encourage students to practice with different pairs of fractions and to check their work by simplifying their answers.

Fraction Fun: Sums with Denominators 10 & 100 – Class walkthrough of examples – Let’s add fractions like 1/10 + 3/10 and 1/100 + 20/100 together! – Guided practice for students – Try adding 2/10 + 5/10 or 50/100 + 25/100 with a partner. – Open discussion on challenges – Share what’s tricky about adding these fractions. – Questions and clarifications | Begin the lesson by working through examples of adding fractions with denominators of 10 and 100. Use visual aids like fraction strips or circles to help students visualize the concept. Move on to guided practice, where students try similar problems with support. Encourage them to work in pairs or small groups to foster collaboration. Open the floor for students to discuss any difficulties they encounter and address their questions. This interactive approach helps solidify their understanding and builds confidence in working with fractions. Prepare additional examples for students who grasp the concept quickly and need more of a challenge.

Class Activity: Fraction Bingo! – Receive your unique Bingo card – Listen for called-out fraction sums – Sums like 1/10 + 9/10 or 1/100 + 99/100 – Mark correct sums on your card – Shout ‘Bingo!’ when you complete a row – Be the first to get a full row and win | This interactive game is designed to help students practice adding and subtracting fractions with denominators of 10 and 100. Each student will receive a Bingo card populated with various fractions. As the teacher, you will call out sums or differences, such as 3/10 + 7/10 or 50/100 – 25/100. Students will need to calculate the answers quickly and mark them on their Bingo cards. The first student to complete a row (horizontal, vertical, or diagonal) should yell ‘Bingo!’ and you will check their answers to confirm they are correct. Possible variations of the activity could include having students create their own Bingo cards with fractions they choose, or playing ‘Blackout Bingo’ where the goal is to fill the entire card. This activity reinforces mental math skills and the concept of equivalent fractions.