Working with fractions at L2

Adult Numeracy Level 2 Working With Fractions Dave Cross Suffolk New College

Fractions at Level 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Revision of fractions at Level 1 ,[object Object],One and a Half = = = 1.5 Or Three Halves One whole and one half 1- 2 1 3-2

[object Object],Revision of fractions at Level 1 The top number (numerator) is lower in value than the bottom number (denominator) 2 1

[object Object],Revision of fractions at Level 1 The top number (numerator) is higher in value than the bottom number (denominator) 2 3

[object Object],Revision of fractions at Level 1 So here we divide 3 by 2 giving one and a half Thus 3/2 (improper) = 1 ½ (Mixed) 2 3

[object Object],Revision of fractions at Level 1 If we divide the number above the line by the number below, this will give us the same number expressed as a decimal = 2 3 1 0 3. 2 5 1.

Now Fractions at Level 2 ,[object Object],[object Object],[object Object],3 out of 12 = 3/12 We can simplify this fraction by dividing the top and bottom by their common factor (here, three goes into 3 and 12, so we divide both by 3) = ¼

Fractions at Level 2 ,[object Object],[object Object],[object Object],= We can simplify this fraction by dividing the top and bottom by their common factor (here, three goes into 15 and 12, so we divide both by 3) 12 15 4 5

Fractions at Level 2 ,[object Object],[object Object],In Q2 we found this answer as a simplified improper fraction = 5/4 Can you explain why 1.25 = 125% ? 1 0 2 2 0 5 5. 4 1.

Adding Fractions at Level 2 ,[object Object],Or 100/100 + 20/100 + 5/100 = 125/100 In words ‘one hundred and twenty five PER cent’ Remember- 1per cent is the same as one hundredth 5x1% 2x10% 1x100% 5 2 1. Hundredths Tenths Units

Adding Fractions at Level 2 ,[object Object],+ + = ? 4 5 8 2 12 7

Adding Fractions at Level 2 + + = Look at all three denominators 4, 8, and 12 What is a common multiple (what number do they have in common?)? + 4 5 8 2 12 7 24 30 24 6 24 14

Adding Fractions at Level 2 ,[object Object],+ + = = =2 24 30 24 6 24 14 24 50 12 25 12 1

Working with fractions at L2

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Working with fractions at L2