This is the seventh in a series of videos about the binary number system which is fundamental to the operation of a digital electronic computer. In particular, this video covers adding together floating point binary numbers for a given sized mantissa and exponent, both in two’s complement. The addition of numbers in base 10 standard scientific form is examined first, before the same methods are applied to floating point binary numbers. Representation errors resulting from truncation are mentioned, as well as overflow and underflow. The video includes worked examples.