Question

The standard form of the number 12345 is ______.

Options

• 1234.5 × 10¹

• 123.45 × 10²

• 12.345 × 10³  

• 1.2345 × 10⁴

Answer 1

The standard form of the number 12345 is `bb(underline(1.2345 xx 10^4))`.

Explanation:

A number in standard form is written as a × 10^k, where a is a terminating decimal such that 1 ≤ a ≤ 10 and k is any integer. So, 12345 = 1.2345 × 10⁴