Number line – adding and subtracting integers
MathematicsNumbers & ArithmeticAges 11–12
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Sign in to playThree screens explore adding and subtracting integers through money: Chips shows each +1 saving or −1 debt as a chip and can cancel opposite pairs automatically; Net worth adds up several assets and debts into a net worth on the number line; Generic lets you choose the number line range, a starting point and up to two addition or subtraction steps in a row, drawn as a chain of jumps. Adapted from the "Number Line: Operations" simulation by PhET Interactive Simulations, University of Colorado Boulder (CC BY 4.0); rewritten.
Lesson: Adding and subtracting integers
How to use
Parameters you can change
- Screen Chips, Net worth, Generic
- Chips: cancel opposite pairs automatically
- Net worth: turn on all items at start
- Generic: number line range −10 to 10, −20 to 20, −30 to 30
- Generic: starting point -30–30
- Generic: operation 1 sign Add (+), Subtract (−)
- Generic: operation 1 value 0–30
- Generic: use a second operation
- Generic: operation 2 sign Add (+), Subtract (−)
- Generic: operation 2 value 0–30
