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Welcome to Addition: Adding Big Numbers! – Learn to add big numbers – We’ll add numbers like 23 and 5 – Use models for easy understanding – Picture blocks or drawings to help us see the numbers – Adding means more together – If you have 2 apples and get 3 more, now you have 5 apples! – Practice with fun activities | This slide introduces first graders to the concept of addition with regrouping. Start by explaining that sometimes when we add, the numbers are too big to count on our fingers, so we use models like blocks or pictures to help us visualize the process. Emphasize that adding is simply combining two groups to make a larger group. Use everyday examples like combining apples to illustrate this point. During the class, engage the students with hands-on activities where they can use physical objects or drawings to practice adding a two-digit number and a one-digit number with regrouping. Make sure to walk through a few examples as a class before letting them try on their own.

Understanding Our Numbers – What are two-digit numbers? – Numbers like 10, 23, where there are tens and ones – Recognizing one-digit numbers – Numbers from 0 to 9, such as 1 or 6 – Counting practice up to 100 – Let’s count together from 1 to 100! – Introduction to regrouping – Sometimes when we add, we get more than 10, and we have to ‘carry’ the extra to the next place value | This slide is aimed at helping first graders understand the concept of two-digit and one-digit numbers. Start by explaining that two-digit numbers are made up of tens and ones, using examples like 10 and 23. Then, clarify that one-digit numbers are the building blocks of larger numbers and range from 0 to 9. Engage the class in a counting exercise to 100 to reinforce their understanding of number sequence. Introduce the concept of regrouping in preparation for adding two-digit and one-digit numbers, explaining that sometimes when we add, we get a number larger than 9 and need to carry over to the next place value. For the activity, have students practice counting with physical objects or illustrations and prepare simple addition problems that require regrouping.

Adding Without Regrouping – Start with 12 + 3 – Add 3 to the last digit of 12 – Use blocks to show addition – Imagine 12 blocks, then add 3 more – See how 12 + 3 equals 15 – Count all the blocks together for the total | This slide introduces students to the concept of adding a one-digit number to a two-digit number without the need for regrouping. Begin by explaining that when we add a one-digit number to a two-digit number, we only add to the ones place. Use visual aids like blocks or drawings to represent the number 12 and then add 3 more blocks to help students visualize the addition process. After combining the blocks, guide the students to count all the blocks together to find the total, which is 15. This hands-on activity will help solidify their understanding of basic addition without regrouping.

Understanding Regrouping in Addition – When numbers add up over 9 – Regrouping makes a new ten Like putting 10 ones into 1 ten’s place – Example: Adding 9 + 5 9 + 5 is more than 9, so we make a group of 10 and count what’s left – Practice regrouping together | This slide introduces the concept of regrouping, a fundamental part of addition when the sum exceeds 9. Start by explaining that sometimes two numbers add up to a value greater than 9, and we need to ‘regroup’ to keep counting efficiently. Use manipulatives like blocks or drawings to show how ten ones can be grouped into one ten. For example, with 9 + 5, combine nine ones with five ones to make one group of ten and four ones left over, which equals fourteen. Encourage students to use physical objects to practice this concept and understand that regrouping helps us manage larger numbers in addition.

Adding With Regrouping: Let’s Use Blocks! – Start with the example 15 + 7 – Regrouping: Ones place can’t have 12 – When we add 5 and 7, we get 12, too big for ones place! – Place 2 in ones, carry over 1 to tens – Write 2 below ones, and add 1 to the tens place (1+1) – Practice with blocks to make 22 – Use blocks to show 1 ten and 2 ones, making 22 | This slide introduces the concept of regrouping when adding a two-digit number to a one-digit number. Use the example 15 + 7 to show that when the ones place adds up to more than 9, we need to regroup. Explain that we write the second digit in the ones place and carry over the first digit to the tens place. Use physical blocks or visual aids to help students understand the concept of regrouping by physically moving the blocks to represent the tens and ones places. Encourage hands-on practice and ensure that students are comfortable with the process before moving on to more complex examples.

Let’s Practice Addition with Regrouping! – Solve 23 + 5 together – Adding 5 to 23, think of 23 as 20 and 3 – Count carefully – Check your work – Understand regrouping – When we add 3 and 5, we get 8, no need to regroup here | This slide is an interactive class activity designed to help first graders practice the concept of addition with regrouping. Start by presenting the problem 23 + 5 on the board. Guide the students through the process of adding the one-digit number to the two-digit number, emphasizing the importance of counting carefully. Encourage them to check their work after solving the problem. Use this opportunity to introduce or reinforce the concept of regrouping, although it is not required for this particular problem. Prepare to walk through the steps of regrouping with a more complex example if time allows. Have manipulatives ready for students who may need a hands-on approach to understand the concept better.

Your Turn to Try: Adding with Regrouping! – Now we add with regrouping – Use blocks for help – Blocks represent ones and tens – Try adding: 34 + 6 – Remember to make a group of ten – Try adding: 27 + 8 – If you have more than 9 blocks, regroup! | This slide is an activity for students to practice adding with regrouping. Provide students with physical blocks to represent ones and tens, which will help them visualize the process. For 34 + 6, guide them to add 4 blocks to the 6 blocks, making a group of ten and then regrouping. For 27 + 8, they will need to add 7 blocks to 8 blocks, again regrouping after reaching ten. Encourage students to explain their thought process as they work through the problems. Offer assistance as needed and praise their efforts to build confidence. Prepare to demonstrate the process with blocks under a document camera or on the board if necessary.

Class Activity: Addition Art – Create an art piece with addition – Use stickers for numbers – Draw lines for regrouping – Show how ones become tens – Share and explain your addition | This activity is designed to help first graders understand the concept of regrouping in addition by using a hands-on art project. Provide the students with stickers representing different numbers and have them create an addition problem on paper. They should use stickers to represent the one-digit and two-digit numbers they’re adding together. Encourage them to draw lines to group the ones into tens where necessary, which will visually represent the regrouping process. Once completed, each student will present their art piece to the class, explaining how they added the numbers together and how they used regrouping to find the answer. This will reinforce their understanding and allow them to demonstrate their knowledge in a creative way. Possible variations of the activity could include using different materials like beans, buttons, or stamps, and creating group art where students collaborate on a larger piece.

Review: Adding Big Numbers with Regrouping – Recap on adding big numbers – We learned to add numbers like 23 + 5 – Demonstration of regrouping – Who can show us 34 + 7 with regrouping? – Open floor for questions – Practice problem recap – Let’s solve 46 + 8 together again | This slide aims to consolidate the students’ understanding of addition with regrouping. Start by recapping the steps to add two-digit and one-digit numbers, emphasizing the concept of ‘carrying over’ when the sum exceeds 9. Invite a student to demonstrate regrouping on the board to reinforce peer learning. Open the floor for any questions to clarify doubts and ensure comprehension. Conclude with a practice problem, guiding the students through the process. This interactive review will help solidify the day’s lesson and prepare them for further practice at home.

Great Work on Addition with Regrouping! – Congratulations on learning regrouping! – Practice is key to mastering addition – Homework: Complete the worksheet – Try the problems using blocks or drawings – Bring any questions to our next class – We’ll review any tricky problems together | This slide wraps up the lesson on adding two-digit and one-digit numbers with regrouping. It’s designed to congratulate first graders on their hard work and encourage them to continue practicing at home to solidify their understanding. The homework assignment is an addition worksheet that will provide further practice on the concept of regrouping. Remind students to use models like blocks or drawings if they need help visualizing the process. Let them know that it’s okay to have questions and that we will address any difficulties in the next class. The goal is to build confidence and ensure that each student feels supported in their learning journey.