(Y7) Extend and apply the laws and properties of arithmetic to algebraic terms and expressions (ACMNA177)ACMNA179
(Y7) Solve simple linear equations (ACMNA179)
7.NS.1.B Understand p + q as the number located a distance |q| from p, in the positive or negative direction depending on whether q is positive or negative. Show that a number and its opposite have a sum of 0 (are additive inverses). Interpret sums of rational numbers by describing real-world contexts.