Multiplying Integers

Multiplying Integers explains the sign rules for products of positive and negative numbers in NSW Year 7 maths (NESA outcome MA4‑INT‑C‑01). Multiply the sizes first, then decide the sign: matching signs give a positive answer and different signs give a negative one, so \(-8 \times -5 = 40\).

You will link multiplying to repeated addition on a number line, count the negative factors in longer products, compare \((-4)^2\) with \(-4^2\), and find missing factors. Real contexts include a temperature that falls by the same amount each hour and a diver going down at a steady rate. It is part of Year 7 Integers.