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'If-then' is a key idea in mathematics and the sentence structure "If… then…" is very commonly used. It is at the core of most planning and of much deductive thinking.

It is vital for students to get used to hearing, thinking about and using if-then statements.

If-then statements

Conditional statements that start with a hypothesis and end with a conclusion are called 'If-then' statements.

Proportional reasoning

Multiplicative thinking is needed to understand ratio and proportion.