Unit 2- Addition and Subtraction

• UNIT 2 REVEAL MATH REVIEW

• Preassessment Form

• 
  

• Math Manipulatives

• Halloween Fun:

• Halloween Greg Tang Game Board

• Digital Bingo Halloween Board

• 
  

• Rounding:

• Round to the Nearest Hundred using Rounding Rules 

• Rounding to the Nearest Ten 

• Examples rounding to the nearest 10 and 100 | 3rd grade | Khan Academy 

• Front End Estimation 

• 
  

Addition up to 10,000:

• 4digit grid blank paper

• Addition By Counting On (Matholia)

• Math Antics - Multi-Digit Addition 

• Addition to 1000 (Without Regrouping) (Matholia)

• 
  

• Regrouping with addition:

• Addition to 1000 (With Regrouping) (Matholia) 

• Addition with regrouping | Addition and subtraction within 100 | Early Math | Khan Academy 

• 
  

Subtraction up to 10,000:

Math Antics - Multi-Digit Subtraction 

Subtraction with Regrouping  

• Worked example: Subtracting 3-digit numbers (regrouping)

•  Subtracting with regrouping | Khan Academy

 Subtracting: three digit numbers and basic regrouping | Arithmetic | Khan Academy 

Subtracting: Regrouping from zero | Addition and subtraction | Arithmetic | Khan Academy 

Fun Songs with UMIGO - Count Back Jack (SUBTRACTION) 

• Extra Resources:

• Khan Academy- number lines adding and subtracting

• Open number line

• Greater than, less than, equal to video 

• State test questions Review for Unit 1 -Unit 2

• 
  

• Resources for bar modeling:

• Tutorial bar model 3rd grade student (1 step)

• Tutorial bar model from a 3rd grade student(2 step) 

• Thinking Blocks Jr. 

• 
  

• Examples of 3rd Grade Student Tutorials:

• bar model 1 step tutorial 

• bar model 1 step tutorial

• bar model 2 step tutorial

• 2 step bar model video 

• 2 step bar model video