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Equation
"Two expressions which have the same value
 
Equilateral triangle
A triangle with all sides and angles the same size.
 
Estimate
To find an approximate answer to a more difficult problem. E.g. 31.2 x 5.94 is roughly equal to 30 x 6 = 180.
 
Expand
"To multiply out brackets in an expression. For example
 
Expression
A collection of terms which can contain variables (letters) and numbers. E.g. 4pq - q + 7
 

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