spreadsheets

spreadsheets

1. 3 main parts

   • data
     • The text or numbers that have been typed in.
   • labels
     • Headings, used to explain the data
   • formulas
     • =A1+B1 the plus sign adds A1 and B1 =A2-B2 the minus sign takes A2 away from B2. =A3*B3 THE ASTERISK SIGN (*) MULTIPLIES A3 BY B3 =A4/B4 the forward slash divides A4 by B4.
     • are automatic calculations.

2. Formulae/functions

   • Functions are more advanced calculations that the spread sheet can do
   • =SUM(A1:E1)
     • The SUM function is used to add up the cells A1, E1 and everything in between. Whithout this, we would have a very log formula.
   • =AVERAGE(A1:E1)
     • AVERAGE will find the average of cells A1,E1 and everything in between.
   • =IF(A1>A9,"Pass","fail")
     • IF functions make decisions. If the tes score is larger then 49, the test result of 'pass' will be displayed. otherwise, the result of 'Fail' will be displayed
   • =MIN(A1:E1)/=MAX(A1:E1)
     • MIN will find the smallest number in range of cells A1 to E1. MAX will find the larges number in range of cells A1 to E1.

3. Formatting techniques

   • coloured borders
   • Cells can be formatted according to their data type for example cells with money can automaticly have a pound sign placed in front by assigning a currency data type
   • Cells can be merged or combined together for example cells A1:C1 can be merged to form a big cell of A1.
   • The font can be changed for example colour, bold.
   • The background fill tool can change the background of the cells.

4. relative/absolute

   • relative cell referance
     • when you replicate a formula down a spreadsheet, the cells in the formula will change depending on what row the formula is in

5. benefits

   • when data changes formulas automatically recalculate.
   • Computers do not make mathematical errors like humans.
   • Charts and graphs can be produced and customized very easily.
   • You can change information in a spread sheet model to make and test predictions.

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