Question

Evaluate the expression: 3.0x103 – 2.0x102

Answer 1

The expression given to us is
`3.0* 10^3-2.0* 10^2`. We know that
`3.0* 10^3=3000` and
`2.0* 10^2=200`.

Therefore, the given expression can be written as:

`3.0* 10^3-2.0* 10^2=3000-200=2800`

Which again can be rewritten as:
`2.8* 10^3`

Thus, the evaluation of the given expression
`3.0* 10^3-2.0* 10^2` gives us: 2800 or
`2.8* 10^3`.

Answer 2

3.0×10³ - 0.20×10³ = 2.8×10³