Unit 1. Class notes, originally in Catalan. Published as the unit goes on.
Naturals, integers and rationals. The parts of a fraction, fractions on the number line (interactive) and the set diagram with the types of decimals.
Exercises 4, 5 and 2: which set each number belongs to, true or false, and a company's monthly profit.
Simplest form with the HCF, equivalent fractions (and finding x), and addition and subtraction with the LCM.
Exercise 19 a, b and c: adding and subtracting fractions with the LCM.
Multiplying and dividing fractions, the sign rule and the order of combined operations, with examples.
Exercises 27 f, 28 b and 43 a: divisions with signs, a multiplication and a combined operation.
Exercises 42 and 43: combined operations with fractions. Questions only.