Question

anwser my question that is find the product by suitable properties
158 into 99

Answer 1

$$\begin{gathered} 158\times 99 \\ =158\times \left(100-1\right) \\ =158\times \left[100+\left(-1\right)\right] \\ =158\times 100+158\times \left(-1\right)\left[\mathrm{Distributive}\mathrm{law}\right] \\ =15800-158 \\ =15642 \end{gathered}$$