Overview
The Formatted as (equivSyntax) method checks if the learner response is expressed in a specific format. This method is not a comparison method so no correct answer is set by the author. Instead when this method is used alone, any answer that is of the specified form will be marked as correct.
When combined with the Numerically equals to (equivValue) method, this method can be useful for constraining the possible correct answers.
Additional Options
Forms
There are eight different forms that you can select from. Some forms have an additional field associated with them that allows you to further define the desired correct answer format. We are using the convention that all nonzero digits, all trailing zeros, and zeros between nonzero digits are significant and that all leading zeros are not significant.

Number (integer or decimal)  Any integer or floating point.
 Additional field: Decimal places

Integer  Any integer.
 Additional field: Significant figures

Decimal  Any decimal value.
 Additional field: Decimal places

Scientific  Any number in scientific notation. This option requires the coefficient to be greater than or equal to one and less than 10.
 Additional field: Significant figures
 Fraction  Any fraction, either a simple or mixed fraction.
 Mixed fraction  Any mixed fraction. This option requires the numerator of the fractional part to be less than the denominator.
 Simple fraction  Any fraction expressed as an integer divided by an integer.
 Fraction or decimal  Any fraction or decimal.
Decimal and thousands separator
Authors can specify what separators should be recognized by the engine and can be used by the learner. From the Decimal separator dropdown either a dot or a comma can be selected. Depending on the selection of the decimal separator, from the Thousand Separator dropdown dot, comma, and/or space can be selected.
Ignore LaTex text
This option refers to LaTeX text only and when enabled the engine will ignore any LaTeX text in the authored value and learner response when comparing for equivalency. For example, any text added in a Text block by the author or units entered by the keypad are set as LaTex text and would be ignored.
Examples
Form 
Additional field 
Learner response 
Result 
Number 
2 0.5 .5 .500 .834 1/2 
true true true true true false 

Number 
1 
0.5 .5 .500 
true true false 
Integer 
5 0.50 1÷2 50% 
true false false false 

Integer 
3 
105 100 1000 
true true false 
Decimal 
1.0 1.23 1. 1 
true true true false 

Decimal 
3 
1.000 1.234 1.2 
true true false 
Scientific 
2 \times 10^3 1.2 \times 10^{2} 10 \times 10^2 
true true false 

Scientific 
2 
2.34 \times 10^3 1.2 \times 10^{2} 
false true 