Debug Algorithm
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Double Digit Subtraction Using the Standard Algorithm for Google Slides™ Seesaw™
Teaching double digit subtraction without regrouping during Distance Learning? This interactive subtracting 2-digit numbers digital activity is a great way to review or introduce the standard algorithm without regrouping with 3 different activities to allow for easy differentiation and scaffolding. Pre-loaded and ready to use with Seesaw™ and Google Slides™, as well as in PPT™, ideal for Distance Learning, Virtual Learning, Hybrid Learning, In-Person, Asynchronous and Synchronous Learning, M
1st - 2nd
Arithmetic, Basic Operations, Math
CCSS
1.NBT.C.4
, 2.NBT.B.5
, 2.NBT.B.6
+3
Place Value and Partial Sums Algorithm
I created and used this PowerPoint with my 2nd grade students. It focuses on Place Value- Ones, Tens, and Hundreds and the Partial Sums Algorithm. You can also download my worksheets that go with the PowerPoint!
The PowerPoint includes:
-Chart showing hundreds, tens, and ones place value
-Circle the number in the ones place
-Circle the number in the tens place
-Circle the number in the hundreds place
-Directions for a place value game with place value chart
-Examples of the partial sums algori
1st - 3rd
Basic Operations, Math, Numbers
Partial Sums Addition Lesson
This slideshow will walk students step-by-step through the partial sums algorithm. It’s perfect for first and second graders who have practiced adding with base-ten blocks and are ready to move to a deeper understanding of adding multi-digit numbers without using manipulatives! Make sure your students have a thorough understanding of expanded form prior to using this slideshow.
1st - 3rd
Basic Operations, Math, Place Value
CCSS
2.NBT.A.1
, 2.NBT.A.3
, 2.NBT.B.5
+1
Also included in: Partial Sums Addition Bundle
2 Digit Subtraction With Regrouping-Digital Interactive Math Review
Digital Interactive Slides Designed for Google Classroom! Your students will practice 2 digit subtraction using the standard algorithm. This game includes 30 interactive slides! You can easily upload the Google Slides format of this game to Google Classroom, so your students can each have their own copy. . . Two FormatsPowerPoint Google Slides (The link is included in the PowerPoint) What's Included30 INTERACTIVE SLIDES Instructions and example of how to drag number tiles. Skills2 Digit Subtra
1st - 3rd
Basic Operations, Math, Numbers
Target Number Card Game
This is a math game with so many possibilities for building students' number sense through problem! Students use number cards to discover algorithms and solutions in this fun math game! Spark their interests and motivations with this hands-on activity!
1st - 12th
Basic Operations, Fractions, Math
CGI- Strategy Practice for Addition
After teaching 2nd grade for several years, I observed that my students were confusing the following strategies: direct modeling, counting on, counting back, and using invented algorithms. Therefore, I created this resource to model the different strategies for students. This product is practicing addition from 1 + 2 up to 1+ 10 for the number sets 1-10.There are 90 different problems categorized in numerical order. This product can be used for direct instruction, practice, and/or assessment.
K - 3rd
Basic Operations, Math, Numbers
CCSS
2.OA.B.2
Can you find the difference?
Directions: draw 6 cards to make two 3-digit numbers. Record both numbers on an open number line. Find the difference between the two numbers. Use the algorithm to check your work!
1st - 3rd
Basic Operations, Mental Math, Place Value
CCSS
2.NBT.A.1
, 2.NBT.A.2
, 2.NBT.A.4
+4
Adding and Subtracting by Multiples of 10
One way to add and subtract mentally is to understand the role place value plays. Too often, students are taught only one way to add and subtract by using regrouping as the algorithm. While this knowledge is important, having the number sense to add and subtract two and three digit numbers (or more!) helps the student to visualize what he or she is doing when problem solving mathematically.
This set of worksheets gives a brief explanation and example of the thought process behind adding and su
1st - 4th
Arithmetic, Basic Operations, Numbers
Subtraction- Two Digit Numbers with Common Core Strategies
Teaching Common Core Math makes sense. Teaching with meaning, without memorization. This power point has seven strategies to use with common core instruction. These methods encourage students to solve problems without the traditional algorithm. Post it on your website for parents to assist their children, use it in the classroom, print it for student as they go on vacation, they can be posters, or at a center, or even to assist with student math journals.
1st - 3rd
Basic Operations, Mental Math, Place Value
Strategies for 2-digit Subtraction
This no-prep lesson has four days of subtraction strategies. Each day has a warm-up, number talk, instruction, guided practice, independent problem, and self-reflect. Students will learn to use number lines, expanded form, and the standard algorithm.
1st - 3rd
Basic Operations, Math
CCSS
1.NBT.C.4
, 2.NBT.B.5
, 3.NBT.A.2
Three-Digit Addition Review
Use these slides as either a presentation (in person or on google classroom) or a printed handout for students to review how to add using four strategies: base ten (place value chart), number bonds, number lines, and vertical form (standard algorithm). Students can both see examples and practice using these strategies on their own. These problems do not include regrouping.
1st - 4th
Basic Operations, Math, Place Value
CCSS
2.NBT.A.1
, 2.NBT.B.5
, 2.NBT.B.6
+3
Strategies for Adding 2-digit Numbers
This is a powerpoint lesson on "Adding 2-digit Numbers." This can be taught in three separate days. Each day has a warm-up, number talk, strategy, and practice problems. The three strategies are: number lines, expanded form, and standard algorithm.
1st - 3rd
Basic Operations, Math, Numbers
CCSS
2.NBT.B.5
, 2.NBT.B.6
, 2.NBT.B.7
Also included in: Addition Activities and Games
Double Digit Addition Without Regrouping Google Slides & PP | Distance Learning
This interactive digital resource will help your students become Better, Faster, and More Efficient at two-digit addition without regrouping. Included Activities:• 2-Digit addition with Base Ten Blocks (drag and drop). • Adding numbers in Expanded Form (fill in the blank). • Standard algorithm addition (fill in the blank). • Standard algorithm addition (drag and drop). Check out the Preview for a closer look. What's Included?• PowerPoint Version. • Google Slides Version¹. ¹ Note: When you purch
1st - 3rd
Basic Operations, Math
CCSS
1.NBT.C.4
, 2.NBT.B.5
CPA Multiplication Strategy Posters | Sea Theme | Concrete Pictorial Abstract
Help students tackle multiplication with confidence using these CPA Multiplication Strategy Posters—designed to model a range of methods for understanding multiplication using the proven Concrete–Pictorial–Abstract approach. With a calm ocean-inspired design, these visuals make math accessible, consistent, and beautiful. This resource guides students through multiple ways to solve multiplication problems—from MAB blocks and arrays to regions, and formal algorithms. Whether you're working on reg
1st - 8th
Basic Operations, Mental Math, Other (Math)
CPA Division Strategy Posters | Sea Theme | Concrete Pictorial Abstract Math
Help students tackle division with confidence using these CPA Division Strategy Posters—designed to model a range of methods for understanding division using the proven Concrete–Pictorial–Abstract approach. With a calm ocean-inspired design, these visuals make math accessible, consistent, and beautiful. This resource guides students through multiple ways to solve division problems—from MAB blocks and length models to number lines, and formal algorithms. Whether you're working on regrouping, nu
1st - 8th
Basic Operations, Mental Math, Other (Math)
Addition and Subtraction Christmas Craft
Are your students tired of completing worksheets to show their thinking with addition and subtraction? This craft is the perfect way to allow students to do something new while also getting the practice they need. They also make the perfect bulletin board or hallway display. Need easy differentiation? This set is perfect for you. You can choose which numbers and strategies you want your students to use. Included in the product:Header Card Each gift comes 2-4 on a page. Gifts include:counting o
1st - 3rd
Basic Operations, Math
CCSS
1.NBT.C.4
, 2.NBT.B.5
, 2.NBT.B.7
+1
Dice Addition and Subtraction
Sometimes, the best activities are the most simple! This dice addition and subtraction game is a fun way to scaffold students' math skills. Students roll dice and write down the numbers, then find the sum or difference. Ample space is provided for students to check their work with a second strategy or draw a strip diagram. This EDITABLE file includes three digit, two digit, and one digit pages. Your students will love playing together, and you'll love how they build number sense as they ensure t
1st - 4th
Arithmetic, Basic Operations, Math
CCSS
1.NBT.C.4
, 1.NBT.C.6
, 2.NBT.B.7
+1
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