We know that $14-13=1$14−13=1.
Use this to find:
$34-13=\editable{}$34−13=
$44-13=\editable{}$44−13=
$54-13=\editable{}$54−13=
$74-13=\editable{}$74−13=
Use what you know about subtracting to find:
We know that $29-14=15$29−14=15.
Use this to find:
We know that $38-25=13$38−25=13.
Use this to find: