Question

divide: 811 ÷ 20 = □ r □

Explanation:

Step1: Find how many times 20 fits into 811

We know that \( 20\times40 = 800 \), and \( 20\times41=820 \) which is more than 811. So the quotient is 40.

Step2: Calculate the remainder

To find the remainder, we use the formula \( \text{remainder}=\text{dividend}-\text{(divisor}\times\text{quotient)} \). So \( 811 - (20\times40)=811 - 800 = 11 \).

Answer:

\( 811\div20 = \boldsymbol{40} \) R \( \boldsymbol{11} \)