Solve problems involving unequal sharing and grouping using knowledge of fractions and multiples

What this means, in plain words

A multiple of a number is what you get when you multiply it by a whole number, so 12 is a multiple of 3.

A fraction describes part of a whole, or part of a set, once the whole has been split into equal pieces.

This is problem solving: the maths is met inside a situation, so the first job is working out which operation the question is asking for.