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Welcome to Subtraction! – Greetings and introduction – Understanding ‘taking away’ – If you have 5 apples and eat 2, you take away 2 from 5. – Subtraction shows what’s left – After taking away, count what remains to see the result. – Practice subtracting 2 – Let’s try: 6 – 2 is ?, or 4 – 2 is ? | Begin the class with a warm welcome to set a positive tone for learning. Introduce the concept of subtraction as ‘taking away’ numbers, using relatable examples like apples to illustrate the point. Explain that subtraction helps us figure out the quantity that remains after some has been taken away. Engage the students with simple subtraction problems involving the number 2, and encourage them to use their fingers or objects to physically represent the problems and find the answers. This hands-on approach will help solidify their understanding of the concept.

Understanding Subtraction: Taking Away – Subtraction means taking away – Find out how many are left – If you have 5 toys and give 2 away, how many do you have left? – It shows the difference – The difference is what you get after you subtract – Like eating some of your cookies – Imagine having 10 cookies and eating 2, how many cookies are left? | This slide introduces the concept of subtraction to first graders by relating it to a simple and relatable activity – eating cookies. Subtraction is explained as the process of taking away from a total amount, which helps us find out how many items are left. Teachers should use real-life examples, such as playing with toys or eating cookies, to illustrate the concept. Encourage students to think of subtraction as a fun activity, like eating some of their cookies, and then counting how many are left. This will help them understand the idea of ‘difference’ in a tangible way. During the lesson, use props or visual aids like toy cookies to demonstrate subtraction in action.

Subtracting 2 from Numbers Up to 20 – Practice subtracting 2 from numbers – Example with apples: 5 – 2 – If you start with 5 apples and take 2 away – How many apples are left? – 5 – 2 equals 3 apples – After taking 2 apples away, we have 3 left | This slide is aimed at helping first graders practice the concept of subtraction by taking away 2 from a given number. Start by explaining that subtraction means taking away from a group. Use the example of 5 apples, and visually demonstrate taking 2 apples away, so students can see that 3 apples remain. Emphasize the subtraction sentence ‘5 – 2 equals 3’ and encourage students to use their fingers or objects to practice this concept with different numbers up to 20. The goal is for students to become comfortable with the idea of ‘taking away 2’ and to understand the resulting quantity.

Let’s Try Together: Subtracting 2 with Blocks – Use blocks to subtract 2 – Start with 10 blocks – Imagine having 10 blocks in front of you – Take 2 blocks away – Physically remove 2 blocks from your pile – Count the blocks left – How many blocks do you have now? | This slide is an interactive class activity designed to teach first graders the concept of subtraction by using physical objects like blocks. Start by explaining that subtraction means taking away. Show them 10 blocks and then physically remove 2 blocks while the class counts along. After removing the blocks, ask the students to count the remaining blocks to reinforce the concept that 10 minus 2 equals 8. This visual and tactile method helps solidify the understanding of subtraction. Encourage the students to try this with different numbers of blocks to practice subtracting 2. The goal is to make them comfortable with the idea of ‘taking away’ and understanding that subtraction gives us the number that remains.

Subtraction Practice: Let’s Subtract 2! – Time to practice subtracting by 2 – Count backwards carefully – If you have 5 apples and eat 2, how many are left? – We’ll solve problems as a team – Example: 10 – 2. Start at 10, count down 2 steps to 8. – Interactive board activity | This slide is designed to engage first-grade students in a subtraction activity. Encourage them to use their fingers or objects to count backwards when subtracting 2 from a number. Start with simple problems and gradually increase difficulty. Use the board to demonstrate the process, and invite students to come up and solve problems in front of the class. This will help them understand the concept of ‘taking away’ 2 and see subtraction as a fun activity. Provide positive feedback and assistance as needed. Possible activities include using physical objects like blocks or counters, drawing pictures to represent the subtraction, or using a number line.

Subtraction Story: Taking Away 2 – Read a subtraction story together – Characters take away 2 items – For example, if a character has 5 apples and gives 2 away, how many are left? – Calculate items left after subtraction – Use fingers or objects to help count – Understand subtraction by story | This slide introduces the concept of subtraction within the context of a story to make it relatable and easier to understand for first graders. By having characters in the story take away 2 items, students can visualize the subtraction process. Encourage the students to actively participate by counting along with the story. Use props or illustrations to demonstrate the subtraction of two items and ask the students to calculate the remaining number of items. This will help them grasp the concept of ‘taking away’ in a fun and engaging manner. Prepare to assist with counting and reinforce the concept by asking similar questions throughout the story.

Class Activity: Subtraction Bingo – Let’s play Subtraction Bingo! – Solve subtraction problems correctly – Use subtraction skills to find answers for Bingo – Mark off the right answers on your Bingo card – Each correct answer gets you closer to Bingo – Aim to get a full row and win! – A full row can be horizontal, vertical, or diagonal | This interactive class activity is designed to make learning subtraction fun through a game of Bingo. Each student will receive a Bingo card with different subtraction problems up to 20. As you call out subtraction questions, students will solve them and mark off the answers if they appear on their cards. Encourage students to use mental math or counting back strategies to find the correct answers. Prepare small prizes for the winners to motivate participation. Possible variations of the activity could include playing in pairs, using different patterns for Bingo, or having multiple winners. This game will help reinforce their understanding of subtracting 2 and other numbers up to 20.

Review and Goodbye: Subtracting 2 – Today’s subtraction lesson recap – Subtracting 2 from numbers up to 20 – If we have 5 apples and eat 2, we have 3 left. – Understanding what’s left after subtraction – It’s like taking 2 toys away from a group of toys. – Celebrating our learning and looking forward | This slide is meant to wrap up the lesson on subtraction by revisiting the key points. Start by asking the students what they learned about subtraction to engage them in a conversation. Emphasize that subtracting 2 helps us figure out how many items remain after taking 2 away. Use concrete examples like apples or toys to illustrate this concept, as it’s crucial for first graders to visualize math problems. Praise the students for their hard work and let them know you’re excited to see them in the next class. This positive reinforcement will encourage them to look forward to learning more about math.