Interactive Number Line
Number lines for whole numbers, integers, fractions and decimals: drop points, draw jumps with an equation, and hide labels for practice.
Tap the line to place a point. Tap it again to remove it.
Tap the line to drop a point on the nearest tick · press and slide to aim · keyboard: ← → move, Enter places
How to Use the Interactive Number Line
A number line helps students see numbers as distances, not just symbols. This free interactive number line covers 0–10, 0–20 and 0–100, integers from −10 to 10, fractions from halves to twelfths, tenths, hundredths and any custom range you type. Drop colored points, draw hop arcs that build an addition and subtraction equation, or hide the labels so the class has to reason about where each number belongs. It runs in your browser on Chromebooks, iPads, laptops and interactive whiteboards, with no app or account needed.
Get started in 3 steps
Choose a range. Pick a preset such as −10 to 10 or 0–2 in fractions, or set your own start, end and interval. For fractions, choose the denominator and whether labels are simplified or shown as mixed numbers.
Tap to add points or jumps. In Points mode, tap the line to drop a labeled point on the nearest tick, and tap it again to remove it. In Jumps mode, tap a start tick and then each landing spot; the arcs show the change and the equation builds itself.
Practice and present. Turn on Hide labels and let students tap a question mark to check one answer, or place a mystery point and ask for its value. Classroom Presentation Mode fills the screen with a big line and hides ads.
Ways to use it in your classroom
Model adding and subtracting integers
Choose the −10 to 10 preset and switch to Jumps. Tap −3, then tap 4: the arc and the equation show −3 + 7 = 4. Then start at 2 and jump to −5 to show 2 − 7 = −5. Middle schoolers can see that crossing zero is just a longer jump, not a new rule.
Place fractions on the line
Pick the 0–2 fractions preset with a denominator of 4 and turn on mixed numbers, so 5/4 reads as 1 1/4. Turn on Hide labels, then call out fractions for third and fourth graders to place in Points mode. Points show letters instead of values, so the class has to reason about each spot.
Mystery point number talk
Turn on Hide labels and press Mystery point. A question mark appears on a tick while only the ends and zero stay labeled. Students reason from those anchors — “it’s three tick marks past halfway” — then you reveal the value. Press New mystery point for another round.
Decimal place value with tenths
Use the 0–1 tenths preset, start at 0.1 and jump to 0.3 to show 0.1 + 0.2 = 0.3. Then switch to hundredths, where every tenth is labeled and the ticks between count hundredths. Ask fourth and fifth graders to drop points at 0.4 and 0.45 and explain which is greater and why.
Frequently Asked Questions
Are the fraction and decimal labels exact?
Yes. Every tick is stored as a whole number of halves, tenths, hundredths and so on, so labels and equations are calculated exactly, like 1/4 + 3/4 = 1 or 0.1 + 0.2 = 0.3, with no rounding errors.
Can I make a number line with negative numbers or decimals?
Yes. Use the −10 to 10 preset, or choose Custom and enter a start, end and interval such as −2 to 2 by 0.25. Custom lines allow up to 40 steps and up to three decimal places.
Can students use it with a keyboard?
Yes. Tab to the number line, use the left and right arrow keys to move along the ticks, and press Enter to place a point or a jump. Your range and label settings are saved in this browser for next time.
How do I teach adding and subtracting negative numbers on a number line?
Choose the −10 to 10 preset and switch to Jumps. Tap a start tick, then tap where to land. A jump to the right is added and a jump to the left is subtracted, and the equation builds itself, such as −4 + 6 = 2 or 3 − 5 = −2. Students can see each answer as a distance moved, not a rule to memorize.
How do I show fractions on a number line?
Pick the 0–1 or 0–2 fractions preset and choose a denominator from 2 to 12. Each whole is split into that many equal parts. Turn on simplified labels to show 2/4 as 1/2, or mixed numbers to show 5/4 as 1 1/4. Leave both off when you want students to count the parts themselves.
How is this different from the number line in Math Manipulatives?
The number line in Math Manipulatives is a simple 0–10, 0–20 or 0–100 line for counting on, counting back and skip counting in grades K–2. This tool adds negative numbers, fractions, decimals and custom ranges, plus points, hidden labels and a mystery point for older students. Use whichever matches the numbers your class is working with.