Question

$20 \div 5(8-4)$ এর মান কত?

Answer 1

$20 \div 5(8-4)$

$=20 \div 5(4)$

$=20 \div 20$ [ গুণ চিহ্ন না থাকলে ‘এর’ বিবেচনা করতে হয় ]

$=1$

যদি সরলটি নিচের মত হতো তাহলে-

$20 \div 5 \times (8-4)$

$=20 \div 5 \times 4$

$=20 \times \frac{1}{5} \times 4$

$=\overset4{\bcancel{20}}\times\frac1{\bcancel5}\times4$

$=16$

Comments

The issue here is that there's no explicit multiplication symbol between $5$ and $(8-4)$. In mathematical conventions, when written this way, $5(8-4)$ is treated as a single term, meaning multiplication should be performed first to make it a single number.