Commutative, Associative and Distributive Laws

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Commutative, Associative and Distributive Laws.pdf

План на урока

Lesson plan for students.pdf

Which operation is first? What is the result?

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Can we use Distributive Law with mixed operations - (addition and subtraction in brackets) and multiplication?

Can we use Distributive Law with mixed operations - addition (in brackets) and division and subtraction (in brackets) and division?

The "Commutative Law" say we can&nbsp;swap numbers&nbsp;over and still get the same answer when we&nbsp;add:

The "Commutative Law" say we can&nbsp;swap numbers&nbsp;over and still get the same answer when we&nbsp;multiply:

Watch the video. Can we swap numbers when we do addition and multiplication?

Commutative Laws

The 5th Primary school "Mityo Stanev", Stara Zagora, Bulgaria "Easy Math" - CLIL, EC4Cs Иновации в действие 2022

Does Distributive law help us to calculate numbers easier?

Distributive Law

Commutative Law - Разместително свойство Associative Law - Съдружително свойство Distributive Law - Разпределително свойство swap - разменям calculate - изчислявам times = multiply by; by the same as - същото като

that it doesn't matter for the result how we group the numbers (i.e. which we calculate first) when we&nbsp;add. But it matters for the way we calculate. It helps us to find the easiest and the fastest way.

that it doesn't matter for the result how we group the numbers (i.e. which we calculate first) when we&nbsp;multiply. But it matters for the way we calculate. It helps us to find the easiest and the fastest way.

The "Distributive law" says that we can open the brackets to calculate numbers easier.

The "Distributive law" says that we can group numbers into brackets to calculate them easier.

125.4=(100+20+5).4=100.4+20.4+5.4=400+80+20=500

Commutative, Associative and Distributive Laws

Does it matter how we group the numbers when we do addition? And multiplication?

Associative Laws

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