The addition of natural numbers

	The addition of natural numbers
	Operations with natural numbers I

1. The addition of natural numbers.

When adding, we join two values into one.
The operation of doing sums is also known as addition.
Terms in the sum are called addends and the result is called the sum.

Solve these operations by distributing the numbers below to the corresponding circles.
When you click on the Init button new sums appear.

Esta unidad interactiva requiere la máquina virtual de Java J2RE.

When you type the right number it will appear in the window. If the typed number is not correct it will not appear.

	Eduardo Barbero Corral

	Spanish Ministry of Education. Year 2007

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