Look For The 10's Quiz

Please read through the Look for the 10's - Addition Made Easy post before trying this quiz. Try to do the addition in your head, without using a calculator or a pen and paper. There is no time limit, so feel free to spend as much time as you need on each question. 

Quizzes by Quibblo.com

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?

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.

Math Quiz - Adding Coins at the Store

Please read through the associated post "Adding Coins at the Store" before you take this quiz. Don't forget to mouse over the questions to get the full text!

Quizzes by Quibblo.com

Adding Coins at the Store

Let's start off with a basic math problem involving addition with money. When you are finished why not test yourself for fun with this post's quick math quiz?

So you're standing in the queue for the checkout with a few things you've picked up for your lunch. The day's been going well so far and you're feeling pretty good, that is until you reach into your pocket for your wallet to find it's not there. You've left your wallet and all your money in the office.

Quickly you rummage through your pockets and feel a surge of relief when your fingers hit some cool metallic coins and soft dollar bills. You pull them out to find that you are holding 3 dollar bills, 3 2-cent coins, 2 half dollars (=50 cents), 1 quarter (= 25 cents), 1 dime (=10 cents) and 8 cents.  From past experience you know that your lunch will cost you $4.50. The question is - do you have enough money?

                                         

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Hello and welcome to Multiply Your Maths, a site that is dedicated to helping people of all ages improve the way they think about and use maths. If you want to learn math tips, get basic math help or try out some math quizzes and math games then this is the place for you. On this site you will find everyday examples of math problems involving multiplication, division etc., all explained in straightforward language.

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