Arithmetic

Divisibility rules are quick tests that tell you whether one number divides evenly into another without having to do the full division.

Long division is a step-by-step written method for dividing large numbers, repeating the cycle of divide, multiply, subtract, and bring down.

Long multiplication breaks a multi-digit multiplication into smaller steps using partial products, then adds them together.

BODMAS gives the correct sequence for evaluating expressions with multiple operations: Brackets, Orders, Division, Multiplication, Addition, Subtraction.

Column addition lines up numbers by place value and adds from right to left, carrying any overflow into the next column.

Column subtraction lines up numbers by place value and subtracts from right to left, borrowing from the next column when needed.