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Grade 3 · Semester A

Chapter 3 · Addition and Subtraction — Part 2

Original lessons, consolidation, and practice assessments.

This original chapter develops addition and subtraction — part 2 through concrete representations, diagrams, and abstract calculations. The lesson order follows the public Dimensions Math 3A topic sequence; exercises and explanations are independently authored.

6lessons
1consolidations
28review questions
24exam questions

Advanced learners may test ahead, but should still demonstrate conceptual reasoning and unfamiliar problem solving.

Lesson pathway

01
Addition with Regrouping3A-C03-L01 · concept, examples, practice, exit check
→02
Subtraction with Regrouping — Part 13A-C03-L02 · concept, examples, practice, exit check
→03
Subtraction with Regrouping — Part 23A-C03-L03 · concept, examples, practice, exit check
→04
Estimating Sums and Differences — Part 13A-C03-L04 · concept, examples, practice, exit check
→05
Estimating Sums and Differences — Part 23A-C03-L05 · concept, examples, practice, exit check
→06
Word Problems3A-C03-L06 · concept, examples, practice, exit check
→
PracticeConsolidate the chapter →

Review and verification

Chapter reviewMixed questions spanning every lessonPractice examinationFresh original questions; untimedComplete solutionsAnswer reasoning for all questions

Mastery requirements

Demonstrate accurate calculation, an explanation connected to a useful model, independent application, and delayed retention. A high routine score alone does not establish transfer.

These public resources are supplemental learning materials and are not publisher placement examinations.