3.3 Unit Overview

Develop fluency with addition and subtraction within `1,000` while using rounding and estimation to determine the reasonableness of answers.

By Amplify Classroom

Grades: 3rd Grade

Subject: Math

Learning goals: Unit at a Glance Sub-Unit 1: Adding Within 1,000 (Lessons 1–8) • Fluently add within `1,000` using algorithms based on place value and properties of operations. • Use place value understanding to compose and decompose numbers. Sub-Unit 2: Subtracting Within 1,000 (Lessons 9–14) • Fluently subtract within `1,000` using algorithms based on place value, properties of operations, and the relationship between addition and subtraction. Sub-Unit 3: Rounding Within 1,000 (Lessons 15–18) • Round whole numbers to the nearest multiple of `10` and `100`. Sub-Unit 4: Solving Two-Step Problems (Lessons 19–22) • Assess the reasonableness of solutions. • Solve two-step story problems using addition, subtraction, and multiplication.