About Number Line: Operations
Explore operations with integers using an authentic context of net worth, then generalize with a number line. Experiment with adding and subtracting both positives and negatives, and make predictions about whether the total will be positive or negative.
How to play Number Line: Operations
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Explore operations with integers using an authentic context of net worth, then generalize with a number line.
Questions & answers
- What is Number Line: Operations?
- Number Line: Operations is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Explore operations with integers using an authentic context of net worth, then generalize with a number line. Experiment with adding and subtracting both positives and negatives, and make predictions about whether the total will be positive or negative.
- What can kids learn from Number Line: Operations?
- It helps kids explore: represent addition and subtraction of integers on a horizontal number line reason about addition and subtraction of integers in terms of number-locations use logical necessity to reason that addition has the opposite effect as subtraction or that adding (or subtracting) a negative integer has the opposite effect as adding (or subtracting) a positive integer. recognize and generate equivalence classes of integer sums and differences show that a number and its additive inverse (opposite) have a sum of 0 using a net worth context, describe situations that have a positive sum or difference, negative sum or difference, and zero sum or difference view adding a negative as equivalent to subtracting a positive, and explain why this relationship makes sense in contexts such as net worth. view subtracting a negative as equivalent to adding a positive, and explain why this relationship makes sense in contexts such as net worth. apply a number line model for addition and subtraction to new contexts.
- What age is Number Line: Operations good for?
- It is designed for middle school (roughly ages 10–14), and curious kids outside that range can absolutely enjoy poking around it too.
- Is Number Line: Operations free to play?
- Yes — Number Line: Operations is completely free on crumble.lol and runs fully in your browser on computers and tablets.