Mathweave Primary 5 maths› Four Operations of Whole Numbers› Undo the wrong step› Lesson video Undo the wrong step Primary 5 Four Operations of Whole Numbers · Lesson video · 2 min 14 s Use the result of the wrong operation to recover the earlier value, then apply the operation that was intended. Practise this lesson → Questions in this lesson 0:05 Today's question: Siti had a length of ribbon. She wanted to cut it into 5 equal pieces, but she cut it…