Fill gaps correctly in binomic formulas
A binomic formula is shown together with the expanded and simplified term. The binomic formula term contains a blank space where a number, variable or arithmetic operator has been concealed.
The gap has to be filled in with the correct number, variable or arithmetic operator.
The summands of the formula's factors will be either a variable and a literal number or both of them will be variables. In no case, both summands will be numbers, which means the expanded term will always contain variables and it does not simplify to a single literal number.
The numberof problems is selectable. It can be chosen what categories of
- arithmetic operators
are asked for.
Variables that appear will always be named a and b or x and y.
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