Question

0.0000123 written in standard form is__

Answer 1

1.23 ×
`10^(-5)`

Explanation:

A number expressed in standard form has the form

a ×
`10^(n)`

where 1 ≤ a < 10 and n is an integer

Express the number given as a number between 1 and 10, that ia

1.23 ×
`10^(n)`

We require to obtain the original number by moving the decimal point by moving the decimal point back 5 places to the left.

Move to the right then n > 0

Move to the left then n < 0

Thus

0.0000123 = 1.23 ×
`10^(-5)`