Question

$\huge\bf{Question:-}$
How do vegetable seller fast calculation in mind?

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Answer 1

Answer:

Because they have daily practice of it

Answer 2

☞￣ᴥ￣☞ THEIR DAILY PRACTICE AND EXPERIENCE MAKE THEIR MIND TO MAKE FAST CALCULATIONS .

HOPE IT HELPS ❣️｡.ﾟ+ ⟵(｡･ω･)