The Assumption Method, also known as the Supposition Method, is one of the most common Singapore Math problem-solving techniques.

Introduced in Primary 4 (P4) Math classes, students can use this method to solve similar Guess and Check questions that they have learnt in Primary 3 (P3).

This Math heuristic still remains useful even if students move on to the upper Primary levels such as Primary 5 and Primary 6.

Since the Assumption Method is known to be faster and more systematic, it is usually preferred as compared to the Guess and Check Method to solve certain Math questions.