The multiplication of natural numbers

Operations with natural numbers II

3 a . The properties of the multiplication of natural numbers.

You can move the name of properties and the numeric expressions with examples from the circles below. You must put everything that refers to the same property in the same line.

  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

3 b . Property of the multiplication in relation to addition. Distributive property.

Multiplying a number by a sum of other numbers is the same as multiplying that number by  each addend separately and then add the products.

Multiplication satisfies the distributive property over addition and subtraction.

  Esta unidad interactiva requiere la máquina virtual de Java J2RE.

In this window you can see an example and check that the same result is obtained.

When you click on Init different numbers will appear.

  Esta unidad interactiva requiere la máquina virtual de Java J2RE.  

Here you have to multiply the factor outside by each one of the addends. It is not about  finding the final result of all that.

Type the result of each operation in the control box below the window in the correct order. After typing the number you must click on Enter.

When you type the right number it will appear in the window but it won't if the number is wrong.

Eduardo Barbero Corral

Spanish Ministry of Education. Year 2007