Vault Cracker
An equation is a balanced scale: doing the same move to both sides keeps it equal, and inverse operations isolate the unknown so its value can be revealed.
MathematicsAges 10-13~10 min🎙️ Voice tutor
Play freeNo account needed
What your child will figure out
- Keep an equation balanced by applying the same removal, addition, or split to both sides.
- Choose inverse operations that isolate a mystery box, then connect the box to x only after the balance model is understood.
- Solve one-step, coefficient, and two-step equations and explain why a one-sided move breaks equality.
- Continue generated practice as difficulty adapts through negatives and variables on both sides.
The levels
- Keep the promise
Predict, test, and explain why removing three dots from both sides isolates a symbol-free mystery box while a one-sided move tips the scale.
- Numbers appear
Transfer the same balanced removal to numbered quantities and connect the concrete dots to box + 3 = 7.
- Meet x
Interpret two x boxes as 2x and split both sides equally to solve 2x = 8.
- Two-move transfer
Transfer the balance method to the novel equation 2x + 1 = 7 by undoing addition before splitting both sides.
Ready when they are.
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