Joe Doe (joe_doe_zero) wrote in 0_arithmetic,
Joe Doe
joe_doe_zero
0_arithmetic

Subtraction

Subtraction



If you have mastered simple addition then subtraction should come easy. Subtraction is "taking away" something. If I have five apples and I take away some apples then I will have fewer apples. The subtraction sign is the minus sign (-) just as the addition sign is plus sign (+).

For example let's say we have five apples and we take away two. How many remain?

Problem: 5 - 2

Let's remember our number line.

0--1--2--3--4--5--6--7--8--9--

We start with five (5) because that is our starting quantity. Now we take away two (2). We move to the left instead of to the right.

0--1--2--3**4**5--6--7--8--9--

That leaves us at three (3). Therefore:

5 - 2 = 3

or...

Five minus two equals three.

That is how to do simple subtraction.
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