Multiplying out the brackets

Be smart in multiplying

Visualisation of the law

Construction of the diagrams

Dividing a sum by a monomial

Multiplying a sum by a monomial

Multiplying sums by monomials

Distribution of multiplication over addition

Brackets and the negative sign

The negative sign in front of the brackets

Even and odd number of negative signs

Guessing your number

How does Guess a number work?

Guessing the date of a birthday

How does Guess the date of a birthday work?

The area of the whole rectangle

The area of the whole rectangle – product of two sums

Product of two sums

Multiplying a sum and a difference

Product of a sum and a difference

Formula for the number of squares – a polygon

Product of three sums

Product of three sums – the volume of a box