Door 1
Place Value to 10,000
4-digit numbers have Thousands, Hundreds, Tens, Ones from left to right
Grade 3 maths — every concept, with examples
The whole Grade 3 syllabus, chapter by chapter. Read a chapter's concepts and worked examples, then open its door to play.
Door 2
Comparing & Ordering Numbers
Compare numbers starting from the LEFT (the biggest place value)
Door 4
Subtraction with Regrouping
Borrowing is needed when the top digit is smaller than the bottom digit
Door 11
Measurement: Mass & Capacity
Mass is how heavy something is, measured in grams (g) and kilograms (kg)