Question

Estimate the following products using general rule:
$$5281\times 3491$$.

Answer 1

$$5981\times 3491$$
Rounding off by general rule, $$5281$$ and $$3491$$ may be rounded off to $$5000$$ and $$3000$$ respectively.
$$5000$$
$$\times 3000$$
__________
$$15000000$$
__________