Solve problems involving the relative sizes of 2 quantities where missing values can be found by using integer multiplication and division facts

What this means, in plain words

An integer is a whole number, with no fraction or decimal part.

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.

Multiplication is repeated addition of equal groups. Division shares a total into equal groups, or works out how many groups fit.