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Welcome to Subtraction! – Learning to take away numbers – When we subtract, we take away from a total number. – Subtraction is sharing toys – Imagine you have 5 toys and give 2 to a friend, you now have 3. – Making subtraction sentences – We’ll write equations like 5 – 2 = 3 to show this. | This slide introduces first graders to the concept of subtraction as a form of ‘taking away’. Relate subtraction to a scenario they understand, like sharing toys, to make it more relatable and easier to grasp. By the end of the lesson, students should be able to create simple subtraction sentences using numbers up to 10. Encourage them to visualize the act of subtracting by using physical objects like toys or counters. This will help them understand that subtraction is simply finding out how many items are left after some are taken away.

Understanding Subtraction – Subtraction means taking away – It shows how many are left – Like eating cookies and counting – If you have 5 cookies and eat 2, how many are left? – Subtraction sentences up to 10 – Examples: 8 – 3 = 5 or 7 – 4 = 3 | This slide introduces the concept of subtraction to first graders by relating it to a tangible experience like eating cookies. Subtraction is explained as the process of taking away from a total amount to find out what remains. The slide aims to help students visualize subtraction as an everyday activity, making it more relatable and easier to understand. The examples provided should use numbers up to 10 to align with the curriculum. During the class, encourage students to think of their own examples of subtraction from their daily lives. This could be followed by practice problems where students create and solve their own subtraction sentences using numbers up to 10.

Understanding Subtraction Sentences – Subtraction sentence parts – A subtraction sentence is like a story with a beginning, middle, and end. – Minuend: starting number – If we have 10 apples and start eating them, 10 is our minuend. – Subtrahend: number taken away – If we eat 2 apples, 2 is our subtrahend. – Difference: what’s left – We count what apples are left to find the difference. | This slide introduces the basic components of a subtraction sentence to first graders. Begin by explaining that a subtraction sentence tells the story of taking something away and finding out what remains. Use tangible examples, like apples, to illustrate the concept of minuend, subtrahend, and difference. Encourage students to visualize the process of subtraction as a simple story where items are removed, and we count what’s left. Practice with different numbers up to 10 to solidify their understanding. The goal is for students to become comfortable with identifying and using these terms when they create and solve subtraction sentences.

Let’s Try Subtracting! – Start with 10 apples – Give 2 apples to a friend – How many are left? – Solve: 10 apples – 2 apples – Use fingers or objects to subtract 2 from 10 | This slide is an interactive way to introduce subtraction to first graders. Start by asking students to visualize having 10 apples, which makes the concept more concrete. Then, guide them through the process of ‘giving away’ 2 apples to a friend, which represents subtraction. Ask the class to calculate the remaining number of apples to reinforce the concept of subtraction as ‘taking away.’ Encourage students to use their fingers or physical objects to represent the apples and perform the subtraction. This tactile approach helps solidify their understanding of the concept. The goal is for students to recognize that subtraction means you end up with fewer items than you started with.

Using Objects to Subtract – Use blocks to learn subtraction – Start with 5 blocks – Take away 3 blocks – Count how many blocks are left – Example: 5 – 3 = ? After removing 3, we count the remaining blocks. | This slide introduces the concept of subtraction using tangible objects, which helps first graders visualize the process. Begin by explaining that subtraction means taking away. Show them how to use objects like blocks to represent numbers. For the activity, give each student 5 blocks and guide them to take away 3, then count the remaining blocks to find the answer. This hands-on approach makes abstract concepts concrete and easier to understand. Encourage students to use their fingers or drawings if they don’t have blocks. After the activity, discuss the results as a class to reinforce the concept.

Subtraction is Everywhere! – Subtraction during snack time – If you have 5 cookies and eat 2, how many are left? – Subtract when playing with toys – Playing with 10 blocks, put 3 back in the box. Count what’s left. – Think of other subtraction times – Subtraction is part of daily life – Subtraction helps us in many daily activities. | This slide aims to show students that subtraction is a part of everyday activities. Use relatable scenarios like snack time or playtime to illustrate subtraction in a way that resonates with their experiences. For snack time, present a simple subtraction problem involving a common snack, such as cookies. For playtime, use toys like blocks to demonstrate subtracting a certain number and counting the remaining. Encourage students to think of other situations where they might use subtraction, such as sharing candies or during cleanup time. The goal is to help them see subtraction as a useful and everyday skill, not just a math concept. Prepare to facilitate a discussion where students can share their own examples of subtraction from their daily lives.

Class Activity: Subtraction Bingo – Let’s play Subtraction Bingo! – Solve subtraction problems – Use subtraction sentences up to 10 – Cover the answer on your card – Use counters or markers for covering – Aim to cover a full row first | This interactive game is designed to help first graders practice subtraction in a fun and engaging way. Prepare bingo cards with answers (up to 10) in advance. During the activity, call out subtraction problems within the range of 0-10. Students will solve these problems and cover the corresponding answers on their bingo cards with counters or markers. The goal is to be the first to cover a full row, either horizontally, vertically, or diagonally. This activity not only reinforces subtraction skills but also encourages quick mental math. Possible variations include playing for a full card cover, creating themed bingo cards, or pairing students to promote teamwork.