Long Division 100÷30 answer please

$30 \times 3 = 90$.
$30 \times 4 = 120$ (which is too large).
So, 30 goes into 100 three times. Write 3 above the last digit of 100.

$$\begin{array}{r} 3 \\ 30 \overline{\smash{)} 100} \\ \end{array}$$

$3 \times 30 = 90$. Write 90 below 100.

$$\begin{array}{r} 3 \\ 30 \overline{\smash{)} 100} \\ -90 \\ \hline \end{array}$$

$100 - 90 = 10$. This is the remainder.

$$\begin{array}{r} 3 \\ 30 \overline{\smash{)} 100} \\ -90 \\ \hline 10 \end{array}$$

So, $100 \div 30$ is 3 with a remainder of 10.

To express this as a decimal, add a decimal point and a zero to the dividend, and continue dividing.

It's 3 times. Write 3 after the decimal point in the quotient.

$$\begin{array}{r} 3.3 \\ 30 \overline{\smash{)} 100.0} \\ -90 \\ \hline 100 \\ -90 \\ \hline \end{array}$$

$100 - 90 = 10$.

$$\begin{array}{r} 3.3 \\ 30 \overline{\smash{)} 100.0} \\ -90 \\ \hline 100 \\ -90 \\ \hline 10 \end{array}$$

The remainder is 10 again. This means the decimal will repeat.

The answer is $3 \text{ R } 10 \text{ or } 3.\overline{3}$.