# Before and After Concept For P1

Learning heuristic problem sums involving "before", "change" and "after" systematically.

When reading such problem sums, the student will need to identify the 3 stages and understand which of the 3 stages the Q is asking for. Knowing which stage the Q is asking for, will help the student apply the correct number statements.

This is a better way to approach a problem sum than hard coding key words eg "more" = plus or "less" = minus.

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