🧱 The Math Xone · Grade 2 · Adding & Taking Away

Grade 2 maths, one door at a time.

Open a chapter door, read the concepts on the whiteboard, then walk the corridor and solve the questions to clear it. 23 doors in all.

▶ Start at Door 1 See the concepts

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The Grade 2 doors

Each door is one chapter of the maths syllabus. Clear a door to earn stars; your stars are saved on this device.

Door 1 Counting Numbers Forward sequences add 1, backward sequences subtract 1 Open → Door 2 Number Recognition Read a 3-digit number as one whole value, not as separate digits Open → Door 3 Place Value Face value is what a digit looks like, while place value is what it is actually worth base Open → Door 4 Ordinal Numbers Ordinal numbers always end with special suffix letter flags: -st (1), -nd (2), -rd (3), or Open → Door 5 Advanced Addition Always add from right to left: start with the Ones column, then move to the Tens, and then Open → Door 6 Addition Strategies Counting on is fastest when you keep the *larger* number in your head first, even if it is Open → Door 7 Advanced Subtraction Subtraction always works from right to left: always start in the Ones column Open → Door 8 Subtraction Strategies Counting back is perfect for small jumps (like -1, -2, or -3) Open → Door 9 Foundations of Multiplication Multiplication is repeated addition of the same number Open → Door 10 Foundations of Division Division means splitting a large total quantity into perfectly equal shares or smaller gro Open → Door 11 Fractions of a Whole A fraction shows the relationship between a single smaller part and a complete unbroken wh Open → Door 12 Fractions of a Collection A fraction shows the relationship between a single smaller part and a complete unbroken wh Open → Door 13 Introduction to Algebraic Thinking The equal sign (=) indicates that the mathematical value on the left side is completely id Open → Door 14 Two-Dimensional Shapes 2D shapes are completely flat configurations containing length and width measurements but Open → Door 15 Three-Dimensional Shapes 3D solid shapes are thick objects that take up space, defined by three attributes: length, Open → Door 16 Position and Direction Left and Right are opposite horizontal directions Open → Door 17 Symmetry Symmetry means an object looks exactly the same on both sides of a separating fold line Open → Door 18 Measurement - Length Length is the measurement of an object from one end to the other, while height tracks vert Open → Door 19 Measurement - Weight Mass and weight describe how heavy an item feels; a balance scale bucket sinks lower on th Open → Door 20 Measurement - Capacity Capacity is how much liquid a container can hold in total, while Volume is the amount of l Open → Door 21 Measurement - Time A clock has two main tracking hands: the short hand shows hours and the long hand shows mi Open → Door 22 Measurement - Money Indian currency consists of paper banknotes for large amounts and metal coins for small va Open → Door 23 Data Handling We gather data using polling (asking questions), observation (watching), or tracking count Open →

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