Debug Algorithm
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Programs & methods
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
Number Operations & Terminology: Subtracting Multi-Digit • Standard Algorithm
Number Operations & Terminology: Subtracting Multi-Digit • Standard Algorithm Review • ROOKIE Montessori-inspired printable Mental Math help (2 printable pages + key):Subtraction feeling a bit rusty? A great review for the older student. This resource guides young mathematicians to: Review Subtracting multi-digit numbers step by step instructionsCompare work to an example of a completed problemReview precise math terminology among all four operationsEight practice problems included.Included is a
3rd - 5th
Basic Operations, Math, Mental Math
CCSS
3.NBT.A.2
, 4.NBT.B.4
Number Operations & Terminology: Category Multiplication • Standard Algorithm
Number Operations & Terminology: Category Multiplication • Standard Algorithm Review • ROOKIE Montessori-inspired printable Mental Math help (2 printable pages + key):Multiplication feeling a bit rusty? A great review for the older student. This resource guides young mathematicians to: Review multiplying multi-digit numbers with step by step instructionsCompare their work to an example of a completed problemReview precise math terminology among all four operationsEight practice problems included
3rd - 5th
Basic Operations, Math, Mental Math
CCSS
4.NBT.B.5
, 5.NBT.B.5
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
Spooktacular Halloween Multiplication Worksheets
Make math magical this October with our Halloween-themed multiplication word problems! Perfect for helping your students master partial products and the standard algorithm — all wrapped up in fun, seasonal stories that keep them engaged. Each page includes an exciting extension problem to challenge your learners and deepen their understanding. Perfect for practice after your unit test or as a festive review before Halloween! Bring a little spooky fun to your math block and watch your students
3rd
Basic Operations
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
2–3 Digit Addition No Regrouping Worksheets & Error Analysis Bundle
Save money by purchasing this bundle! Individually, these resources total $6.50, but this bundle is available for $5.00. Build student confidence in addition using place value strategies, visual supports, and error analysis tasks designed to deepen mathematical understanding. This bundle combines my: 2 & 3-Digit Addition No Regrouping Worksheets 2–3 Digit Error Analysis Addition Worksheets These resources help students develop fluency with addition while also identifying and correcting commo
2nd - 3rd
Basic Operations
CCSS
2.NBT.B.5
, 2.NBT.B.7
, 3.NBT.A.2
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