Math Lesson Plan · Grades 6–9

One Step Equations Decimals Lesson

Extend students’ one-step equation skills to problems involving decimals. The lesson applies the same inverse operation strategy — balance both sides — to equations with decimal values. Includes 20 practice problems and answer key.

Lesson Overview

Solving One-Step Equations with Decimals

Solving one-step equations with decimals uses the same inverse operation strategy as with integers. To solve x + 1.5 = 4.2, subtract 1.5 from both sides to get x = 2.7. The lesson builds on the balance concept and applies it to decimal values students encounter in real-world contexts.

The seven-page lesson walks through worked examples covering addition, subtraction, multiplication, and division with decimals. Students complete 20 practice problems and check their work using the answer key.

How to Use This Lesson

1. Review inverse operations with a decimal example (pages 1–2). Emphasize place value when adding or subtracting decimals.

2. Work through the decimal equation examples together (pages 3–5). Cover all four operations with decimal values.

3. Assign the 20 practice problems (page 6) independently. Review answers using the key on page 7.

Printable Resource

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