Math Problem Solver

$$15243 + 356=15599$$

$$\begin{aligned} \mathtt{1}\mathtt{5}\mathtt{2}\mathtt{4}\mathtt{3}\\ \mathtt{+\phantom{0}}\phantom{0}\phantom{0}\mathtt{3}\mathtt{5}\mathtt{6}\\ \hline \mathtt{1}\mathtt{5}\mathtt{5}\mathtt{9}\mathtt{9} \end{aligned}$$

$9$ is the digit in the $10^{0}$ place. $3 \times 10^{0} + 6 \times 10^{0} = 9 \times 10^{0}$.

$9$ is the digit in the $10^{1}$ place. $4 \times 10^{1} + 5 \times 10^{1} = 9 \times 10^{1}$.

$5$ is the digit in the $10^{2}$ place. $2 \times 10^{2} + 3 \times 10^{2} = 5 \times 10^{2}$.

$5$ is the digit in the $10^{3}$ place. $5 \times 10^{3} + 0 \times 10^{3} = 5 \times 10^{3}$.

$1$ is the digit in the $10^{4}$ place. $1 \times 10^{4} + 0 \times 10^{4} = 1 \times 10^{4}$.