Key to Fractions - Book 3: Adding & Subtracting

Sometimes a certain concept or area of math study just doesn't "stick" or needs more review. Sometimes you want to introduce an advanced student to more difficult topics. That's what the Key to...^® series is all about: inexpensive, sequentially-oriented and straightforward help on specialized topics.

The softbound student workbooks present concepts and problems in a friendly manner and allow students to work at their own pace. Vocabulary and reading level are simple; instructions are clear and direct; and only one concept is presented per page so students have time to understand new ideas without being overwhelmed.

Each topic comes with a softbound instructor book to help you anticipate and resolve special problems that may arise during teaching. All answers are written out just as if a student had worked them out, which is especially beneficial for students who can use the book to self-correct their work.