Add the Weights
24 = 10 + 10 + 4
24 = 10 + 10 + 1 + 3
24 = 10 + 10 + 2 + 2
24 = 10 + 9 + 1 + 5
24 = 10 + 9 + 2 + 3
24 = etc. etc.
In a similar way to Are you well Balanced? , factors and multiples
are at the heart of this problem as well as addition and
subtraction, even though this may not be the route through which
children solve it. It is important, therefore, to discuss ideas of
multiplication with the class, perhaps after children have first
thought about the problem on their own for a few minutes and then
talked to a partner about possible ways to the
solutions.