Adding 9
Subject: Math
Grade: First grade
Topic: Addition Up To 20
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Welcome to Addition: Adding 9
– Greetings First Graders!
– Today’s focus: Adding with 9
– We’ll practice adding 9 to other numbers
– Why addition is useful
– It helps us count things quickly
– Fun with adding 9
– Let’s enjoy learning how to add 9!
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This slide is designed to introduce first graders to the concept of addition, with a focus on adding the number 9 to other numbers. Start the lesson with a warm welcome and explain that addition is a way to count things faster. Emphasize that today’s lesson will help them become quicker at counting by adding 9 to different numbers. Use examples like 9 + 1, 9 + 2, etc., to show how adding 9 works. Make the learning process enjoyable with interactive activities, such as using physical objects or visual aids to represent the numbers being added. Encourage the students to participate and try adding 9 on their own. The goal is to make them comfortable with the concept of addition and to understand the utility of this mathematical operation in everyday life.
Understanding Addition: Adding 9
– What is addition?
– Addition means putting numbers together.
– Adding numbers gets a sum
– Example with apples
– Like 2 apples + 3 apples makes 5 apples.
– Adding 9 to a number
– If we have 5, adding 9 makes 14.
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This slide introduces the concept of addition to first graders by defining it as the process of combining two or more numbers to get a new number, known as the sum. Use tangible examples like adding apples to make the concept relatable. Explain that when we add 9 to any number, we get a bigger number. For instance, if we start with 5 and add 9, we get 14. Encourage students to use their fingers or counters to add 9 to different numbers up to 20. This will help them visualize the concept and understand that addition is simply combining quantities to find out how many items there are in total.
Adding 9 to Numbers
– Understanding adding 9
– Example: 9 + 1 = ?
– Adding 9 to 1 gives us 10
– Use fingers to add
– Count 9 fingers, then add 1 more
– Use a number line
– Start at 9, jump 1 step to reach 10
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This slide introduces the concept of addition with the number 9. Start by explaining that adding 9 involves combining 9 with another number. Use simple examples like 9 + 1 to illustrate this concept. Demonstrate how students can use their fingers to count 9 and then add one more to find the answer. Additionally, show how to use a number line by starting at 9 and taking one step forward to reach the sum. Encourage students to practice with different numbers, using their fingers and the number line as visual and tactile aids to reinforce the concept of addition. This hands-on approach helps first graders grasp the idea of adding 9 in a fun and interactive way.
Let’s Practice Adding 9!
– Add 9 to numbers 1-11
– Example: 9 + 5 with blocks
– Visualize with 9 blocks, then add 5
– Count 9 blocks, add 5 more
– What’s 9 + 5?
– Find the sum together
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This slide is designed to help first graders practice the concept of adding 9 to numbers within the range of 1 to 11. The goal is to ensure they understand that the sum remains within the limit of 20. Start with a hands-on example using blocks or other manipulatives to count out 9 and then add 5 more, allowing the students to visually see the addition process. Encourage the students to count along and arrive at the sum together. Reinforce the concept by asking what happens when we add 9 to other numbers within the range. This interactive approach helps solidify their understanding of addition with the number 9.
Adding 9 Using a Number Line
– Use a number line to add 9
– Start at the first number
– Begin at the number you’re adding to 9
– Jump 9 steps forward
– Counting forward 9 steps from our starting number
– Example: 9 + 4 on the number line
– Starting at 9, count up 9 more steps to find the sum
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This slide introduces the concept of using a number line to add 9 to another number, which is a visual and interactive method suitable for first graders. Begin by explaining what a number line is and how it can be used for addition. Demonstrate the process by starting at the number that needs to be added to 9 and then making 9 jumps forward to find the answer. Use the example 9 + 4 to show this process in action. Encourage students to draw their own number lines and practice this technique with different numbers. This will help them visualize the addition process and understand that adding 9 moves them forward on the number line by 9 spaces.
Adding 9 – Tips and Tricks
– Think of 9 as 10 minus 1
– Add 9 to 6: use 10 instead
– Instead of 9 + 6, do 10 + 6
– Subtract 1 after adding 10
– After adding, take 1 away
– Find the answer together
– Let’s solve 9 + 6 as a class
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This slide introduces a simple strategy to help first graders add the number 9 to other numbers. By conceptualizing 9 as 10 minus 1, students can more easily perform the addition by first adding 10 to the number and then subtracting 1. This method leverages their familiarity with base-10 to simplify the process. For example, when adding 9 to 6, students should first think to add 10 to 6 to get 16, and then subtract 1 to find the correct answer, 15. Practice this technique with several examples and encourage students to use their fingers if needed to understand the concept of ‘taking away 1’. This approach builds their mental math skills and confidence in handling addition problems involving the number 9.
Class Activity: Adding 9 with Objects
– Each student gets 9 counters
– Receive additional counters
– Partner up for adding practice
– Work together to find sums
– Add 9 to various numbers
– Use counters to visualize adding 9
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This activity is designed to help students understand the concept of addition by using tangible objects. Distribute 9 counters to each student along with a handful of extra counters. Pair up the students and instruct them to use their counters to add 9 to different numbers. For example, if a student has 4 extra counters, they will combine them with the 9 counters to see what 4 + 9 equals. This hands-on activity allows students to visualize the addition process and reinforces the concept of adding 9 to other numbers. Possible variations for different students could include using different objects like blocks or beads, adding 9 to numbers greater than 10, or challenging them to find as many combinations as possible within a set time.
Great Work on Adding 9!
– Congratulations on learning to add 9
– Adding 9 is stepping near to 10
– Think of 9 as 1 less than 10 to make adding easier
– Practice is key to perfection
– The more you practice, the better you’ll get!
– Continue practicing at home
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This slide is meant to wrap up the lesson on adding 9 and to reinforce the concept that adding 9 is akin to reaching just one step below 10. It’s important to acknowledge the students’ effort and progress in learning this new skill. Encourage them to view adding 9 as a simple task by considering it as adding 10 and then subtracting 1, which can be a helpful strategy. Remind them that consistent practice is crucial, and they should continue to work on these skills at home. Provide some easy and fun homework activities or games that involve adding 9 to support their practice.