French numbers require special mental models—especially the vigesimal base-20 construction used for larger numbers. Unlike English where 70 is "seventy" and 80 is "eighty", French constructs 70 as 60 + 10 (soixante-dix), 80 as 4 × 20 (quatre-vingts), and 90 as (4 × 20) + 10 (quatre-vingt-dix).
Practice telephone pairs, ordinals, fractions, and audio dictations to make French numbers automatic for your TEF exam.