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Integer Number Line Bar for School Maths Lab
High-Contrast UV-Printed Scale: Engineered with bold, permanent graduations ranging from negative to positive integers, manufactured from high-impact, non-toxic polymer to ensure long-term legibility and institutional durability during repetitive classroom use.
Integrated Sliding Vector Indicator: Features a specialized center-aligned zero-point anchor and a precision-fit slider, allowing students to physically model absolute distance and directional movement required for mastering complex number line calculations.
$6.77
Quick Answer: An Integer Number Line Bar is a straight bar marked with zero in the middle, positive integers on one side and negative integers on the other. Middle-school maths classes use the integer number line bar to show adding and subtracting integers as moves to the right and left.
Integers as Positions and Moves
Integers become manageable once students see them as positions and moves. On the bar, every integer has its own place, zero separates positives from negatives, and a number further to the right is always greater. That settles a common confusion: −2 is greater than −7 because it lies to its right, even though 7 looks larger than 2.
Addition means starting at the first number and moving by the second: to the right for a positive, to the left for a negative. So −3 + 5 starts at −3 and moves five places right to finish at 2. Subtraction is treated as the opposite move, and subtracting a negative therefore becomes a move to the right. Working 4 − (−3) on the bar and landing on 7 shows why the two minus signs act like a plus, instead of leaving it as a rule to remember.
Distance along the bar introduces difference and absolute value. The change from −4 °C to 6 °C is ten degrees, counted along the line, and the distance of −5 from zero is 5. Contexts such as floors below ground level, withdrawals from an account and depths below sea level can all be acted out on the same scale.
Specifications
| Item | Number line bar marked with negative and positive integers |
| Layout | Zero at the centre, negatives to the left, positives to the right |
| Operations shown | Comparison, addition, subtraction, difference |
| Used with | Integer tiles for zero-pair work |
| Range of numbers, length, material and pointer | Confirm at enquiry |
Applications
- Ordering and comparing positive and negative integers
- Adding integers as moves to the right or left from a starting point
- Showing why subtracting a negative number gives a move to the right
- Finding the difference between two integers, including temperature changes
Care & Handling
- Store the integer number line bar flat or hang it horizontally so it does not bend.
- Wipe the markings with a dry cloth only; solvents can fade printed numbers.
- If a pointer or clip is used with the bar, keep it attached or boxed with it so every group has one.
Why Choose LabEquip
Teachers introducing integers often use two models side by side: the line for moves and the Integer Tiles for zero pairs. LabEquip lists both in its Mathematics School Lab Products range, and the LabEquip contact page takes orders for a single demonstration bar or sets for groups.
Frequently Asked Questions
How is adding integers shown on the bar?
Start at the first number and move by the second: right for a positive number and left for a negative one. For -3 + 5, begin at -3 and move five places right to land on 2.
How does the bar explain subtracting a negative number?
Subtraction is shown as the opposite of adding. Adding -3 means moving three places left, so subtracting -3 means moving three places right. Starting at 4 and moving right three places gives 7, which is why 4 – (-3) equals 7.
Why is -2 greater than -7?
On a number line, numbers increase from left to right. -2 lies to the right of -7, so it is greater. Temperatures help: -2 degrees is warmer than -7 degrees.
What is the difference between a number line and integer tiles?
The number line shows integers as positions and operations as moves, which suits comparison and addition. Integer tiles show integers as collections of positive and negative units that cancel in zero pairs, which suits explaining subtraction and multiplication rules.
At what stage are integers taught with a number line?
Integers are usually introduced in the middle-school years, when students first meet negative numbers in temperature, money and height contexts. The line stays useful later for inequalities and absolute value.
Can the bar show multiplication of integers?
It can show multiplication by a positive number as repeated moves, so 3 × (-2) is three moves of two places to the left, ending at -6. Multiplying by a negative number is easier to explain with tiles or patterns, so teachers usually switch models for that step.
Last Updated: September 2026
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