In this tutorial, we
shall look at:

I. Counting in base two.

II. Addition and
subtraction of numbers in base two.

**Objectives**

By the end of this
lesson, you should be able to:

I. Expand numbers
expressed in base 2.

II. Add, subtract and
multiply numbers in base 2.

III. Solve questions with
addition, subtraction and multiplication signs simultaneously.

Get the tutorial here

**Keywords**

I.

**Number Base**: A counting number system.
II.

**Base Ten:**Most common way of counting in tens (10s) or power of 10.
III.

**Base two:**Counting in twos (2s).
IV.

**Binary Number:**A base two number.