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Showing posts from August, 2015

### Useful Shortcuts For Mac

Last updated: 28/05/17 Short cuts are combinations of keys that you can use to perform tasks with your keyboard.  Short cuts can save you a lot of time, so it is worth your time memorising them.  Nevertheless, there are lots that you can use, so I have listed a few that I find particularly useful.  These are my favourite short cuts for Mac (Yosemite). Safari and word processor short cuts Command + Z This will undo the last action.  This includes opening up an accidentally closed tab; you will have to use this short cut immediately, however. Command + A This will select all and can be used in many applications. Command + F This open or select the search facility in the application if it has one.  This can be useful if you are looking for keywords in a document and will even work in the safari browser.  It will save you reading through lots of text; it does the scanning for you and highlights the keywords you are looking for. Command + T

### Number Types

Before you get started, you will need the following skills: Foil (Algebra - factoring) Exponent rules How to plot a graph How to divide and find the remainder  Surds You will learn about:  The different number types and be able to tell the difference. What a complex number is. How to add/subtract and multiply/divide complex numbers This ——>  ●  is a multiplication sign; i have used it in some places instead of x to avoid confusion Both rational and irrational are real numbers Rational numbers Can be expressed as a decimal or a repeating decimal like 3.333333…. or a fraction like 3/1 or 2/3. Rational numbers come in different types Natural              1, 2, 3, 4, 5 Whole              0, 1, 2, 3, 4         Integer              …-3, -2, -1, 0, 1, 2, 3… The difference between natural numbers and whole numbers is whole numbers includes 0 and natural numbers do not.  Integers have negatives, whereas whole and natural number

### Spotlight: The Operators

If you do not already have Scratch or need extra help, please use the support page The operators manipulate data. You will notice that the blocks have different shapes.  Subsequently, some fit together into some blocks but not others.  Test it out and find out which blocks fit together The first four perform basic maths operations: add, subtract, multiply and divide where divide will give a decimal (the numbers entered in are floating point such as 6.0).  Remember the order of operations matters; furthermore, the rounded blocks will act as parentheses, so anything to be calculated first is anything in parenthesis. Example: (2+3+4) x5 = 45 2+3+ 4 x5 = 25 The next block will pick a random number between any two numbers that you enter. The inequality and equals signs < less than, for example 2 < 6 > Greater than, for example 45 > 20 = Equal, for example 3 = 3 The Boolean operators (named after Geor