The Wayback Machine - https://web.archive.org/web/20160417101506/http://developer.android.com:80/reference/java/math/package-summary.html
Android APIs
Added in API level 1
package

java.math

Classes

BigDecimal An immutable arbitrary-precision signed decimal. 
BigInteger An immutable arbitrary-precision signed integer. 
MathContext Immutable objects describing settings such as rounding mode and digit precision for the numerical operations provided by class BigDecimal. 

Enums

RoundingMode Specifies the rounding behavior for operations whose results cannot be represented exactly. 
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