1)
$$\begin{array}{r} \stackrel{1}{4}7 \\ +\underline{26} \\ 73 \end{array}$$
2)
$$\begin{array}{r} \stackrel{1}{4}36 \\ +\underline{37} \\ 803 \end{array}$$
3)
$$\begin{array}{r} 82 \\ \underline{234} \\ 316 \end{array}$$
4)
$$\begin{array}{r} \stackrel{1}{34} \\ -\underline{27} \\ 7 \end{array}$$