Question

(20×30)×40=20×(30×40)​

Answer 1

Step-by-step explanation:

20×30=600

(20×30)×40=24,000

30×40=1200

20×(30×40)=24,000

Hence it is proved

(20×30)×40=20×(30×40)

Answer 2

Hello!!

$\begin{gathered}(20 × 30) × 40 = 20 × (30 × 40) \\ 600 × 40 = 20 × 1200 \\ 24000 = 24000\end{gathered}$

$\huge{\tt{\colorbox{red}{\color{white}{Hence~proved!}}}}$