Basic Operations

This collection of videos, produced by William Emeny for MathsMaster.org, describe methods of how to perform the basic operations of addition, subtraction, multiplication and addition.

Addition covers adding whole numbers and decimals using the column method.

Subtraction shows how to subtract whole numbers and decimals using the column method.

Multiplication describes how to multiply whole numbers and decimals using the short method and the gelosia method.

Division covers division using the short method and by chunking.

Resources

Multiplication

Short multiplication – Four examples of multiplying numbers using the column method. The examples progress in difficulty multiplying two digit numbers by a single digit number, multiplying a three digit numbers by a single digit number and multiplying a decimal by a number with a single digit.

Gelosia...

Column Addition

Column addition of whole numbers – Five examples of adding whole numbers using the column method. The examples progress in difficulty adding numbers with two and three digits. The third and fourth examples include the need to ‘carry one’ from one column to the next.

Column addition of decimal numbers –...

Column Subtraction

[b]Column subtraction of whole numbers[/b] – Six examples of subtracting whole numbers using the column method. The examples progress in difficulty subtracting numbers with two, three and four digits. The later examples include the need to ‘borrow one’ from one column to the next.

[b]Column subtraction...

Division

Short division – Six examples of dividing numbers using the short, or what is sometimes called the bus stop method. The examples progress in difficulty with the first two examples not requiring any remainders, the next two examples having remainders within the calculation and the last two examples having...

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