5-18 number patterns

One of the rules is t = (s x 3) +1. Using a flexible understanding of the concept of the distributive property, a student might realize that (s-1) x 3 means there are three s’s and then subtract three ones, which would look like s x 3 – 1 x 3 or . s x 3 – 3 but then we have to add 4, so t = s x 3 – 3 + 4 or t = s x 3 +1. ................
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