Unit 1: Multi-Digit Addition & Subtraction

Multi-Digit Addition & Subtraction

Master three-digit addition and subtraction with regrouping, estimation strategies, and mixed operations through engaging real-world scenarios.

4 Lessons • 3 HoursRegrouping StrategiesReal-World ScenariosProblem Solving

Learning Objectives

Addition Skills

Add three-digit numbers with and without regrouping
Use place value alignment for accurate addition
Apply regrouping strategies efficiently

Subtraction Skills

Subtract three-digit numbers with regrouping
Use decomposition method for complex problems
Master borrowing strategies

Lesson 1

45 minutes

Three-Digit Addition (With & Without Regrouping)

Master three-digit addition using place value alignment and regrouping strategies

Scenario: School Library Book Purchase

Learn through engaging real-world problems that make math meaningful and fun.

Key Skills:

Place value alignment

Regrouping strategies

Vertical addition

Problem solving

Start Lesson 1

Lesson 2

45 minutes

Three-Digit Subtraction (With & Without Regrouping)

Learn three-digit subtraction with regrouping and decomposition methods

Scenario: Farm Animal Count

Learn through engaging real-world problems that make math meaningful and fun.

Key Skills:

Subtraction regrouping

Decomposition method

Vertical subtraction

Borrowing strategies

Start Lesson 2

Lesson 3

40 minutes

Addition & Subtraction Estimation

Develop estimation skills using rounding and compatible numbers

Scenario: Shopping Budget Planning

Learn through engaging real-world problems that make math meaningful and fun.

Key Skills:

Rounding strategies

Compatible numbers

Estimation accuracy

Mental math

Start Lesson 3

Lesson 4

50 minutes

Mixed Operations & Applications

Apply addition and subtraction in multi-step word problems

Scenario: Community Book Donation

Learn through engaging real-world problems that make math meaningful and fun.

Key Skills:

Multi-step problems

Problem analysis

Solution strategies

Real-world applications

Start Lesson 4

Unit Overview

What You'll Learn

Three-Digit Addition

Master addition with regrouping using place value strategies

Three-Digit Subtraction

Learn subtraction with regrouping and decomposition

Estimation Strategies

Develop rounding and compatible number skills

Mixed Operations

Apply skills in multi-step word problems

Real-World Applications

Library Management: Calculate total books purchased and track inventory

Farm Operations: Count and track animal populations

Shopping Budgets: Estimate costs and plan purchases

Community Projects: Organize and track donations

Ready to start learning?

Start Lesson 1 All Units