Door 7: Advanced Subtraction
Subtraction always works from right to left: always start in the Ones column
Read the concepts on the whiteboard — your weapons — then walk the corridor and solve the questions to clear the door.
About Door 7: Advanced Subtraction
This door covers Advanced Subtraction from the Grade 2 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 Advanced Subtraction concepts, or jump to another door.