Debug Algorithm
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Programs & methods
3 Digit by 3 Digit Addition Algorithm Steps | Anchor Chart + Student Version
Teaching the standard algorithm for 3-digit addition can feel simple… until regrouping shows up and half the class freezes. I created this step-by-step visual because my students needed something clear, predictable, and consistent to reference — without me reteaching it every time. This resource breaks down 3-digit by 3-digit addition with regrouping into manageable steps that students can actually follow independently. The anchor chart version is perfect for your math wall, and the student vers
3rd - 4th
Arithmetic, Basic Operations
CCSS
3.NBT.A.2
, 4.NBT.B.4
Addition and Subtraction Mats to 1,000 and 10,000 Base Ten & Standard Algorithm
These versatile math mats help students visualize and solve addition and subtraction problems using both base ten models and the standard algorithm. Designed to strengthen understanding of place value and multi-digit operations, these mats give students a clear structure for representing, modeling, and solving problems step by step. This download includes two versions: Version 1: For numbers within 1,000 (three-digit numbers) Version 2: For numbers within 10,000 (four-digit numbers) Each mat
1st - 4th
Arithmetic, Basic Operations, Place Value
CCSS
1.NBT.A.1
, 1.NBT.B.2
, 1.NBT.B.2a
+26
Decimal GAME - Bring It!
This game, BRING IT, will be fun for any arithmetic class. After students have learned the algorithms of adding, subtracting, multiplying, and dividing DECIMALS, rather than giving them a traditional worksheet to do during class, introduce this game. There is some preparation for the teacher, but once prepared, it can be used year after year. This Game promises to be a favorite for teachers and students. Included in this game are more than fifty (50) unique price tags, and several variations
3rd - 7th
Arithmetic, Math
Area Multiplication: Teaching Multiplication with Understanding
This activity shows students what multiplication is and why it works. It is a great alternative to the more common multiplication algorithm and addresses Common Core Standard 4.5 in Numbers and Operations in Base Ten. Area multiplication leads into the my extended activity, Mental Multiplication, and also can be used to multiply polynomials in algebra. Includes journal prompts, homework master, extensions, Common Core standards addressed, and answer key.
3rd - 6th
Arithmetic, Basic Operations, Mental Math
CCSS
3.NBT.A.3
, 4.NBT.A.1
, 4.NBT.B.5
+3
Cross Sum Puzzles (Free Version)
Includes instructions and the first six Cross Sum puzzles from Beast Academy's puzzle collection. Cross Sum puzzles give great practice for student using the standard addition algorithm with 3-digit numbers. Students fill missing digits to create two different sums. One can be read by tilting the grid to the left, and the other can be read by tilting the grid to the right. This free version includes instructions and the first 6 puzzles from the complete set. The Full Version includes 42 puzzles
2nd - 4th
Arithmetic, Basic Operations, Math
CCSS
2.NBT.B.7
, 3.NBT.A.2
, 4.NBT.B.4
GAME: Carnival - Addition & Subtraction & Estimation
GAME: Carnival - Addition & Subtraction & EstimationThe same ol' drill and practice, I called, "Drill and Kill"! We want our students to have speed and mastery of the basic algorithms, yet just problem set after problem set gets wrote and dull. Here is a game I invented that puts strategy, uses estimation, and there is incentive = TO WIN! Students have to stay engaged because if their partner makes a mistake, they get the points. LET'S GO!!!
1st - 4th
Arithmetic, Math
Multi-Digit Multiplication BOOM CARDS™
⭐ Christmas-Themed BOOM CARDS™ to practice Multi-Digit Multiplication⭐ Download this deck of Boom Cards to your teacher account and assign them to your students for a quick check of their ability to multiply (3-digit by 2-digit) using the standard algorithm. Can be used as: Independent WorkStationsExit TicketEarly Finisher WorkInformal AssessmentExtension work for your high achieversNote:⭐Students will need scratch paper or whiteboards to show their work using the standard algorithm ⭐Students mu
3rd - 6th
Arithmetic, Basic Operations
CCSS
5.NBT.B.5
3-Digit Addition with Regrouping Worksheets l 2nd-3rd Grade l Winter l NO PREP
3-Digit Addition with Regrouping Worksheets l 2nd-3rd Grade l Winter l NO PREP.Ready for a challenge? This NO PREP 3-Digit Addition with Regrouping packet is a must-have for your classroom! This resource is essential for 3rd Grade Math students mastering the standard algorithm, and perfect as a 2nd Grade extension activity. It provides targeted practice on three-digit addition and multiple-step regrouping. The worksheets encourage students to show their work to strengthen their understanding of
2nd - 3rd
Arithmetic, Coloring Pages, Numbers
Division with Whole Numbers Interactive Notebook
A Complete Interactive Notes Unit
Interactive Notes are popping up all over the place now. What makes this Interactive Notes unit different? Higher order thinking! For each lesson students self-assess their knowledge on the topic prior to the lesson, then use the interactive parts to learn the meat of the lesson, and finally apply their knowledge to write to explain in the W.A.M. section.
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What Topics Are Covered
Five
3rd - 7th
Arithmetic, Basic Operations, Math
CCSS
5.NBT.B.6
3-Digit Addition No Regrouping Worksheets l 2nd-3rd Grade l Winter l NO PREP
3-Digit Addition No Regrouping Worksheets l 2nd-3rd Grade l Winter l NO PREP.Build confidence with big numbers! This NO PREP 3-Digit Addition (No Regrouping) packet is perfect for introducing or reinforcing place value. Designed for 2nd Grade Math (as an extension) and 3rd Grade Math (as a strong foundation), this resource provides abundant practice on three-digit addition without regrouping. This is an essential step for solidifying Place Value understanding before moving on to complex regroupi
2nd - 3rd
Arithmetic, Coloring Pages, Numbers
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