Here is a little multiplication trick I learned from a teacher in primary school. It shows you how to remember the 9 times table all the way up to 9 x 10.
Showing posts with label Building Blocks. Show all posts
Showing posts with label Building Blocks. Show all posts
Tuesday, May 3, 2011
Step by Step Multiplication
For an overview on multiplication please read the 'Multiplication - The Faster Way to Add' post on this site.
Let's get going straight away with some Multiplication. When you're done, why not try out the Multiply Your Maths Step-by-Step Multiplication quiz?
First off, you're going to have to know your multiplication tables. There are a number of methods out there to help people learn these off by heart, so it's simply a matter of finding what works best for you.
Let's get going straight away with some Multiplication. When you're done, why not try out the Multiply Your Maths Step-by-Step Multiplication quiz?
First off, you're going to have to know your multiplication tables. There are a number of methods out there to help people learn these off by heart, so it's simply a matter of finding what works best for you.
Friday, April 29, 2011
Look For The 10's - Addition Made Easy
Here we will look at a more user friendly approach to addition. When you are finished reading, why not try out the Look for the 10's quiz?
Our number system is based on 10's. This is especially true with addition. Don't believe me? Ask yourself this:
Which is easier to add?
or
Adding numbers that have zeros as their last digits is much easier than adding numbers with many different digits. This is because the zeros can essentially be ignored when you're doing the sum.
Another issue that affects a lot of people is the manner in which they were taught to add. Normally children are shown to add by summing the units, and then carrying any tens to the left. While this obviously works, it has some serious drawbacks. Firstly it confuses many people, who end up following a method rather than engaging with the problem. Secondly it does not work very well as a method of mental arithmetic.
Like most people I learned to do addition in the manner mentioned above. However over time I realised that there is a faster and easier way to do problems like this, which can be 'summed up' (excuse the pun) as Look for the 10's.
Our number system is based on 10's. This is especially true with addition. Don't believe me? Ask yourself this:
Which is easier to add?
57 + 26
or
40 + 20
Adding numbers that have zeros as their last digits is much easier than adding numbers with many different digits. This is because the zeros can essentially be ignored when you're doing the sum.
Another issue that affects a lot of people is the manner in which they were taught to add. Normally children are shown to add by summing the units, and then carrying any tens to the left. While this obviously works, it has some serious drawbacks. Firstly it confuses many people, who end up following a method rather than engaging with the problem. Secondly it does not work very well as a method of mental arithmetic.
Like most people I learned to do addition in the manner mentioned above. However over time I realised that there is a faster and easier way to do problems like this, which can be 'summed up' (excuse the pun) as Look for the 10's.
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