Subtraction

Subtraction is removing some objects from a group. The meaning of 5-3=2 is "Three objects are taken away from a group of five objects and two objects remain".

How Subtraction Works   A beginning subtraction lesson using sets for kids.

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This is the very beginning of understanding how subtraction works. Let's look at this set: Count how many triangles are in this set...  There are 5! Now, take two triangles away...   Count how many triangles are left in the set...  There are 3 left! Here's another one: Look at this set: Count how many circles are in this set...  There are 9! Now, take five circles away...   Count how many circles are left in the set...  There are 4 left!