History of Hindu Mathematics: A Source Book v2.c17.s5.t1.7
History of Hindu Mathematics: A Source Book v2.c17.s5.t1.7
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v2.c17.s5.t1.7
**Operation with an Optional Number.** Bhâskara II describes a method called *Iṣṭa-karma* or “operation with an optional number.” This may be illustrated by the following example :