Math explained
Short, clear explanations of the arithmetic children meet between about 7 and 12. Each page gives the rule or the method, a worked example or two, the mistakes people actually make, and the part usually left out: why it works at all.
Short, clear explanations of the arithmetic children meet between about 7 and 12. Each page gives the rule or the method, a worked example or two, the mistakes people actually make, and the part usually left out: why it works at all.