Solve for: (2.1 * 10^4)+(3 * 10^3)

Expression: $\left( 2.1 \times {10}^{4} \right)+\left( 3 \times {10}^{3} \right)$

Remove unnecessary parentheses

$2.1 \times {10}^{4}+\left( 3 \times {10}^{3} \right)$

When there is a $+$ in front of an expression in parentheses, the expression remains the same

$2.1 \times {10}^{4}+3 \times {10}^{3}$

Factor the expression

$\left( 2.1 \times 10+3 \right) \times {10}^{3}$

Multiply the numbers

$\left( 21+3 \right) \times {10}^{3}$

Evaluate the power

$\left( 21+3 \right) \times 1000$

Add the numbers

$24 \times 1000$

Multiply the numbers

$\begin{align*}&24000 \\&2.4 \times {10}^{4}\end{align*}$