# 15+ Free Double Number Line Worksheets PDF

The double number line, also known as the split number line or broken number line, is an incredibly useful educational tool for visualizing mathematics. It can be used to model, compare, and check subtraction and addition sums or equations, as well as other math operations like fractions and decimals. The double number line works both conceptually and practically in teaching a variety of math skills that lead to deeper understanding.

Teachers can teach early numeracy concepts by having students use manipulative objects on the line to represent a mathematical problem they are solving while more advanced classes can use it to practice number representation in digital form. Overall, the double number line provides an effective learning environment that deepens students’ understanding of key mathematical concepts making them more confident in their abilities to succeed in understanding future math coursework.

## Types of Double Number Lines

A double-number line is a visual representation of related equations. It is composed of two separate number lines that are connected together, forming one continuous line. These double number lines can help students understand the relationships between equations and the relationship between numbers in general. Here are some different kinds of double number lines and how they can be used to explain various topics in mathematics.

### Standard Form Double Number Line

The most basic type of double-number line is the standard form. The standard form consists of two vertical lines that are parallel to each other, with a dotted line connecting them at their respective origins (0, 0). The upper line represents positive values, while the lower line represents negative values. This type of double-number line allows students to visualize the relationship between two equations or sets of numbers in a linear fashion.

### Compound Equations Double Number Line

In compound equations, there are two or more equations that must be solved simultaneously to find a solution for both equations. A compound equation double number line allows students to visualize these multiple equations side-by-side on one continuous line. Each equation will have its own separate set of axes and labels that indicate which equation it belongs to. By plotting each equation’s points on the same graph, students can visually see how they are related and how they interact with each other.

### Inequalities Double Number Line

An inequality double number line consists of two vertical lines that represent an inequality such as “x > y” or “x ≥ y”. On one side of the inequality symbol (>, ≥), all values must be greater than or equal to those on the other side (y). Students can use this type of double number line to plot points on either side and then visually compare them to determine which values satisfy the inequality statement.