Door 3: Addition & Subtraction (Large Numbers)
Line up place values; work from the right
Read the concepts on the whiteboard — your weapons — then walk the corridor and solve the questions to clear the door.
About Door 3: Addition & Subtraction (Large Numbers)
This door covers Addition & Subtraction (Large Numbers) from the Grade 4 maths syllabus. First you study the concepts and worked examples on the whiteboard, then you face a corridor of questions — answer correctly to gain energy and build a combo; a wrong answer lets a monster drain your energy. Clear every question to earn up to three stars.
Want to revise first? Read the full lesson in Addition & Subtraction (Large Numbers) concepts, or jump to another door.