### Extended multiplication techniques

Extended multiplication techniques: Multiplying 2-digit number with same number in unit digit and ten‟s digit add up to 10: Example: (43×47) In this example unit digit is same i.e. 4. And (3+7=10). So, Answer: (3×7) =21 is in RHS. And {(4+1) ×4} =20 in LHS. So final answer is 2021 Multiplying 2-digit number with same