Welcome to Addition and Subtraction! – Learning to add and subtract – Using numbers up to 20 – Solving puzzles with addition – Example: 7 + 5 = ? Let’s solve it together! – Mastering subtraction puzzles – Example: 15 – 4 = ? We’ll find the answer! | This slide introduces first graders to the fundamental concepts of addition and subtraction with numbers up to 20. The goal is to make the learning process engaging by framing it as a skill necessary to solve fun puzzles. Emphasize that addition is putting together and adding to, while subtraction is taking apart and taking from. Use visual aids like number lines or counters to help students visualize the concepts. Incorporate simple puzzles and games that require adding and subtracting to reinforce the lesson. By the end of the class, students should feel comfortable with basic addition and subtraction problems within 20 and be excited to demonstrate their new skills through interactive puzzles.

Understanding Addition – Addition means joining together – Adding makes numbers grow – Example: 2 apples + 3 apples – When we combine 2 apples with 3, we have a total of 5 apples! – Practice: Add numbers up to 20 – Try adding 4 + 5 or 7 + 8 and see what you get! | This slide introduces the concept of addition to first graders. Start by explaining that addition is the process of putting things together to find out how many there are in total. Emphasize that when we add, the total number becomes larger. Use tangible examples like adding apples to make the concept relatable and easier to understand. Show them how 2 apples added to 3 apples equals 5 apples to illustrate the point. Then, encourage the students to practice addition with different numbers up to 20, ensuring they understand that the process is the same regardless of the numbers used. Provide guidance and support as they work through practice problems.

Let’s Practice Adding! – Add 5 and 3 together – What is 5 plus 3? – Add 2 and 4 together – What is 2 plus 4? – How do we solve these? – Let’s solve as a class! | This slide is aimed at engaging first-grade students in a collaborative addition practice. Start by presenting the first problem, 5 + 3, and encourage the students to use their fingers or objects to count and find the sum. Repeat the process with the second problem, 2 + 4. Emphasize the concept of combining groups of items to find the total amount. As you solve these problems together, ensure that students understand that addition is about bringing together and increasing quantities. Encourage participation and praise efforts to build confidence. Prepare to guide them through the process step by step, and consider using visual aids or physical objects if necessary to help them understand the concept of addition.

Understanding Subtraction – Subtraction means taking away – Like when you have 5 candies and eat 2, you have 3 left! – Numbers get smaller when we subtract – Think of it as having a pile of toys and giving some away. – Example: 5 – 2 = 3 – 5 carrots – 2 carrots leaves us with 3 carrots! | This slide introduces the concept of subtraction to first graders by relating it to tangible items like candies and toys, which they can easily visualize. Subtraction is explained as the process of taking away from a total amount, resulting in a smaller number. The example provided uses carrots to show a simple subtraction problem, which helps students understand that subtraction is a part of everyday life. Encourage the students to think of other examples from their daily experiences where they might have subtracted items, like when they share snacks or toys. This will help solidify their understanding of the concept.

Let’s Practice Subtracting! – Subtracting numbers up to 20 – Example: 4 – 1 equals what? – Take 1 away from 4, and we have 3 left – Example: 6 – 2 equals what? – Take 2 away from 6, and we have 4 left – Can you find the answers? | This slide is designed to engage first-grade students in a subtraction activity. Start by explaining that subtraction means taking away. Use objects like blocks or fingers to visually demonstrate the subtraction process. For 4 – 1, you could show 4 blocks and remove 1, then count the remaining blocks. Do the same for 6 – 2. Encourage the students to use their fingers or classroom materials to find the answers. This hands-on activity helps solidify their understanding of basic subtraction. After the activity, discuss the answers as a class and ensure that each student is able to follow along and arrive at the correct answer.

Understanding the Equals Sign – Equals sign means ‘the same as’ – Balances both sides of an equation – Example: 3 + 2 = 5 – 3 plus 2 is the same as 5 – Both sides are equal to 5 | The equals sign is a fundamental concept in mathematics, symbolizing balance and equivalence between two expressions. When teaching first graders, it’s crucial to emphasize that the equals sign means that what is on one side is the same as what is on the other side. Use simple and relatable examples to illustrate this point, such as balancing toys or sharing snacks equally. The example 3 + 2 = 5 is a straightforward way to show that when we add 3 and 2, the result is the same as 5. Reinforce this concept with hands-on activities where students can physically balance objects or use number lines to visualize equality.

Adding and Subtracting Together – Use addition and subtraction – Example with candies – Start with 5 candies, eat 2, then get 3 more – Solve the candy problem – 5 candies – 2 eaten + 3 received = ? – Practice with different numbers – Try with other amounts, like 4 candies, eat 1, get 2 more | This slide introduces the concept of using addition and subtraction within the same problem, a key skill in first-grade math. Start by explaining that sometimes, we need to add and take away in one question. Use the candy example to make it relatable and fun. Walk through the problem step by step: start with 5 candies, subtract the 2 you eat, then add the 3 you receive. The answer is 6 candies. Encourage students to visualize the candies to help them understand the concept. After solving the example together, prompt the students to practice with different numbers to reinforce the concept. This hands-on approach helps solidify their understanding of combining addition and subtraction in practical situations.

Math Bingo: Addition and Subtraction – Play Bingo with math problems – Solve to cover numbers on your card – Use addition or subtraction to find the answer – Aim for a full row to win – Have fun with numbers! – Remember, math can be exciting and enjoyable | This Math Bingo game is designed to help first graders practice addition and subtraction facts up to 20 in a fun and interactive way. Prepare bingo cards with a range of answers up to 20. Call out math problems instead of numbers, and students will solve them and cover the correct answer on their cards. The first student to cover a full row horizontally, vertically, or diagonally shouts ‘Bingo!’ and wins. Make sure to have small prizes or rewards to motivate the students. Possible variations of the game could include using different operations, playing in pairs, or having a ‘blackout’ game where all answers must be covered.