In algebra, letters are used when numbers are not known. Algebraic terms, such as \(2s\) or \(8y\), leave the multiplication signs out. So rather than \(2 \times s\), write \(2s\), and rather than \(8 ...

In algebra, letters are used to stand for values that can change (variables) or for values that are not known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...

Curriki, a global K-12 community for creating, sharing, and finding open learning resources, has launched a free Algebra 1 course aligned with the Common Core State Standards. Available online, this ...

Students of Grade 7 were given a test followed by individual interviews; at the end of Grade 8 the same students were subject to an analogous test and interviews. Each student had to simplify certain ...

https://doi.org/10.5951/mathteacher.112.6.0432 • https://www.jstor.org/stable/10.5951/mathteacher.112.6.0432 Copy URL ...