# Do The Math: Addition & Subtraction B Teacher Guide

The Addition and Subtraction B module focuses on subtraction with numbers up to 100. It reinforces addition and subtraction as inverse operations and teaches the three meanings of subtraction: take-away, missing parts, and comparison problems. The Teacher Guide models mathematical thinking, includes visual representations, and provides point-of-use support to better serve students' individual needs. It includes step-by-step teaching instructions, guidance for monitoring student progress, and specific information about how to use the Classroom Materials and mTools effectively.

#### Full Description

Math is about more than finding the correct answer. It's about using numerical reasoning to find the best strategy for solving a problem. Created by Marilyn Burns, one of America's most trusted math educators, and a team of master educators,

Do The Math is designed to help teachers develop the foundations of mathematical understanding for all students. The Addition and Subtraction B module focuses on subtraction with numbers up to 100. It reinforces addition and subtraction as inverse operations and teaches the three meanings of subtraction: take-away, missing parts, and comparison problems. The Teacher Guide models mathematical thinking, includes visual representations, and provides point-of-use support to better serve students' individual needs. It includes step-by-step teaching instructions, guidance for monitoring student progress, and specific information about how to use the Classroom Materials and mTools effectively.

*Do The Math®*provides flexible, classroom-tested instruction for building numerical reasoning and confidence. "Classroom tested" means there's plenty of support in each module's 30 half-hour lessons. Teachers build capacity as students move from basic conceptual understanding to skills development in addition and subtraction, multiplication, division, and fractions.Do The Math is designed to help teachers develop the foundations of mathematical understanding for all students. The Addition and Subtraction B module focuses on subtraction with numbers up to 100. It reinforces addition and subtraction as inverse operations and teaches the three meanings of subtraction: take-away, missing parts, and comparison problems. The Teacher Guide models mathematical thinking, includes visual representations, and provides point-of-use support to better serve students' individual needs. It includes step-by-step teaching instructions, guidance for monitoring student progress, and specific information about how to use the Classroom Materials and mTools effectively.

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