1. Various mathematical techniques and strategies used to perform subtraction operations, including standard algorithms and alternative approaches
Teachers use different subtraction methods to help students understand how to take away quantities.
Os professores usam diferentes métodos de subtração para ajudar os alunos a entender como subtrair quantidades.
2. Systematic approaches to solving subtraction problems, such as regrouping, counting on, or using number lines
Common subtraction methods include the standard algorithm and the counting up method.
Métodos comuns de subtração incluem o algoritmo padrão e o método de contar para cima.