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Spreadsheets
Mr Arthur
Aims of the Lesson 1
Today’s Lesson1. Note taking
1. What is a Spreadsheet
2. Columns/Rows
3. Simple Formula
4. Complex Formula
2. Complete Credit Task
3. Complete Red Folder
What is a Spreadsheet?
A spreadsheet is an example of a GPP that is used to help you process, store and calculate numbers.
A B C D E F1 The 6 Times Table23 6 x 1 = 64 6 x 2 = 125 6 x 3 = 186 6 x 4 = 24
Columns/Rows
Columns Boxes that go vertically,
for example, column A
Rows Boxes that go
horizontally, for example, Row 1
Columns/Rows/Cell Reference
A B C D E F1 The 6 Times Table23 6 x 1 = 64 6 x 2 = 125 6 x 3 = 186 6 x 4 = 24
Cell E3
Cell A1
Columns
Rows
Simple Formula
Simple Formula
Addition =A1+A2
Subtraction =A1-A2
Multiplication =A1*A2
Division =A1/A2
Complex Formula Complex Formula
Adding a list of numbers = sum(A1:A10)
Calculating Averages = average(A1:A10)
Finding the largest = max(A1:A10)
Finding the smallest = min(A1:A10)
Making Decisions =if(A1>65,”OAP”,”young thing”)
What is a spreadsheet used for?
All types of calculations
TuckshopMars Bars Coke Crisps
Monday 32 44 57Tuesday 12 22 23Wednesday 56 76 73Thursday 23 19 34Friday 16 20 12
Total Items 139 181 199
Unit Cost £0.34 £0.50 £0.30
Cash Total £47.26 £90.50 £59.70
A B C D12345678910111213
TuckshopMars Bars Coke Crisps
Monday 32 44 57Tuesday 12 22 23Wednesday 56 76 73Thursday 23 19 34Friday 16 20 12
Total Items =SUM(B3:B7) =SUM(C3:C7) =SUM(D3:D7)
Unit Cost 0.34 0.5 0.3
Cash Total =B9*B11 =C9*C11 =D9*D11
A B C D
•When data changes results are usually re-calculated
Formulae
Always starts with an equals sign For example =A3 + B9
Symbols used:+ Add- Subtract* Multiply/ Divide
Formulae is usually re-calculated when the number in a cell is changed
SUM
SUM is a function that spreadsheets use to add up a list of numbers to save typing time.
For example : =SUM (A2:A8) instead of:
= A2 + A3 +A4 + A5 + A6 + A7 + A8
What is the sum equivalent of:
= B7 + C7 + D7 + E7 + F7 + G7
Automatic/Manual Calculation
Automatic – spreadsheet will calculate a formula automatically. Most common
Manual – The result of the formula will not be calculated automatically.
Insert row/column Sometimes you need to add an
extra row or column to your spreadsheet to make room for more numbers or formulae.
A new column will have to be added if the tuck-shop decide to start selling Snickers.
The new column will be inserted in-between columns B and C.
TuckshopMars Bars Coke Crisps
Monday 32 44 57Tuesday 12 22 23Wednesday 56 76 73Thursday 23 19 34Friday 16 20 12
Total Items 139 181 199
Unit Cost £0.34 £0.50 £0.30
Cash Total £47.26 £90.50 £59.70
A B C D12345678910111213
Insert a new column
Charting
Why would you want to create a chart? Eye-catching Easier to understand at a
glance Concise
Bar ChartEarnings
£0.00
£100.00
£200.00
Eilidh Calum Bill
Name
Ea
rnin
gs
Line graph
Earnings
£0.00
£100.00
£200.00
Eilidh Calum Bill
Name
Earn
ings
Earnings
Eilidh
Calum
Bill
Pie Chart
Complex Formulae
Average e.g.. =Average(B2:B10) What will this formula work out?
Max e.g. = Max(B12:B67) What will this formula work out?
Min e.g. =Min(B2:B10) What will this formula work out?
Replication
What does it mean? Copying - formulae can be copied into different
cells to save time
•Relative referencing - formula is changed to match the line that it is on
Name Hours worked Hourly rate EarningsEilidh 37 £4.50 £166.50Calum 25 £4.00 £100.00Bill 30 £6.25 £187.50
A B C D1234
=B2*C2=B3*C3=B4*C4
Formatting
TuckshopMars Bars Coke Crisps
Monday 32 44 57Tuesday 12 22 23Wednesday 56 76 73Thursday 23 19 34Friday 16 20 12
Total Items 139 181 199
Unit Cost £0.34 £0.50 £0.30
Cash Total £47.26 £90.50 £59.70
CentredLeft
aligned
Right aligned
Column width changed
Cell attributes - 2 decimal places and formatted to show currency
Cell Protection
What is cell protection? Locking a cell so that the contents can’t be changed
E.g. locking the formulas in C4 and C5 so that the user can’t accidentally change them.
Milk £1.00
Customer No of Pints CostSmith 5 £5.00Jones 3 £3.00
A B C12345
Formulae using IF (Credit)
Spreadsheets uses an IF formula to decide what to put in a cell depending on what is in another cell
For example: =IF(B2>50, “PASS”, “FAIL”)
Pupil Prelim Pass or FailDavid 60 PASSEllen 45 FAILRhona 98 PASS
A B C1
2
3
4
Relative & Absolute Referencing (Credit)
What is relative referencing?- When a formula is replicated the cell reference is
changed to suit the line or column that it is in
=IF(B4>49,"PASS","FAIL")=IF(B5>49,"PASS","FAIL")=IF(B6>49,"PASS","FAIL")
Absolute Referencing (Credit) What is absolute referencing?
When a formula is replicated the cell reference is not changed - it stays exactly the same
C1 always stays the same, as it uses the $ signs
Milk 1
Customer No of Pints CostSmith 5 =$C$1*B4Jones 3 =$C$1*B5
A B C Milk £1.00
Customer No of Pints CostSmith 5 £5.00Jones 3 £3.00
A B C12345
Fully Labelled Charting (Credit) Label for chart series Title x-axis and y-axis labelled Label for each point on a chart showing relation to data
Pocket Money Spent
1.2 1.2 1.2
31.2
1.2
21.2
1.2 1.2
0
5
10
15
20
25
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35
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week
wk1
wk2
wk3
wk4
wk5
wk6
wk7
wk8