831 / 7 747 / 6 931 / 4

Divide 13 by 7.

$$\begin{array}{r} 11 \\ 7 \overline{) 831} \\ -7 \downarrow \\ \hline 13 \\ -7 \downarrow \\ \hline 6 \end{array}$$

Divide 61 by 7.

$$\begin{array}{r} 118 \\ 7 \overline{) 831} \\ -7 \downarrow \\ \hline 13 \\ -7 \downarrow \\ \hline 61 \\ -56 \\ \hline 5 \end{array}$$

The quotient is 118 with a remainder of 5.

$$831 \div 7 = \boxed{\text{118 R 5}}$$

2) $747 \div 6$

Divide 14 by 6.

$$\begin{array}{r} 12 \\ 6 \overline{) 747} \\ -6 \downarrow \\ \hline 14 \\ -12 \downarrow \\ \hline 2 \end{array}$$

Divide 27 by 6.

$$\begin{array}{r} 124 \\ 6 \overline{) 747} \\ -6 \downarrow \\ \hline 14 \\ -12 \downarrow \\ \hline 27 \\ -24 \\ \hline 3 \end{array}$$

The quotient is 124 with a remainder of 3.

$$747 \div 6 = \boxed{\text{124 R 3}}$$

3) $931 \div 4$

Divide 13 by 4.

$$\begin{array}{r} 23 \\ 4 \overline{) 931} \\ -8 \downarrow \\ \hline 13 \\ -12 \downarrow \\ \hline 1 \end{array}$$

Divide 11 by 4.

$$\begin{array}{r} 232 \\ 4 \overline{) 931} \\ -8 \downarrow \\ \hline 13 \\ -12 \downarrow \\ \hline 11 \\ -8 \\ \hline 3 \end{array}$$

The quotient is 232 with a remainder of 3.

$$931 \div 4 = \boxed{\text{232 R 3}}$$