there are a few ways to do it, that was the second way i noticed. the first pattern i saw was
56-14=42.....................its just subtracting
42-12=30.....................two off of the amount
30-10=20.....................you subtract each time
20-08=12
12-06=6
there:
1.in, at, or to that place or position.
"we went on to Paris and stayed there eleven days"
their:
1.belonging to or associated with the people or things previously mentioned or easily identified.
"her taunts had lost their power to touch him"
you can figure out which word to use by figuring out what that word is describing. in this circumstance i am not talking about a place or direction, it would be describing a previously mentioned mathematical formula
This was either written for kids or by someone inept. The pattern is simple, the equations written poorly, and the text has at least two mistakes. You would argue that those details are minor, but a person used to doing things properly is a person used to not make small mistakes. This wasn't written by such a person.