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Write '1/2' on
board; 'What does it mean?' Collect egs & language
used.
Repeat for other unit fractions & extend to
eg; 2/3, 3/5 |
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- Use fraction
notation
- Recognise simple equivalent fractions
- Convert between fractions
- Use diagrams to compare 2 or more simple fractions |
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numerator
denominator
unit fraction
cancel
simplify
convert
equivalent
lowest terms |
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Discuss different
pictures for 1/2;
eg: for 1/2, 2/4, 3/6 draw an identical rectangle
for each one & shade 1 of 2, 2 out of 4 &
3 out of 6 equal parts.
From these, identify the equivalence of the 3 fractions
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Activity
Suggestions:
1) In Pairs: Use cards
with halves, thirds, quarters, fifths, sixths &
tenths families. Sort cards into equivalent groups.
Compare & discuss results with another pair.
2) In Pairs: Equivalent
Snap or Dominoes
OR
3) WS
N2/1 Fractions Wall for visual comparison of
2 fractions
OR
4) All
About Fractions ( see menu of objectives) |
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Teacher to say
/ write a fraction; pupils to record on small whiteboards
an equivalent fraction.
Question explicitly for 'missing members' of an
equivalent family. |
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| Teacher to say
/ write a fraction; pupils to record on small whiteboards
an equivalent fraction. |
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| - Simplify fractions
by cancelling all common factors & identify
equivalent fractions |
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Choose a fraction
eg: 15/40; CFs in both numbers?
Explain how to find common factors systematically.
How do we know when we have found the simplest equivalent
fraction? Shortcut: take out HCF |
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1) Written activity
to find the simplest equivalent fraction by cancelling
all common factors. (Ensure pupils record each step.)
2) Further activity using HCF shortcut.
3) All
About Fractions ( see menu of objectives) |
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| Repeat whiteboard
activity, asking for simplest equivalent fraction. |
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'Complements'
(of 1)
OR
WS
N2/2 Fraction Snakes : snake with at least 10
nos: go up/ down snake or between any 2 numbers
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- Begin to add &
subtract simple fractions & those with common
denominators
- Use diagrams to compare 2 or more simple fractions |
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| Use diagrams to
look at addition & subtraction of 2 fractions
- with same / different denominators |
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1) Generate questions
on + & - on fractions using 3 coloured dice.
1st gives denominator, 2nd gives numerator, 3rd
gives + or -. Extend to 3 or more fractions.
2) All
About Fractions see menu of objectives) |
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Review addition
& subtraction method, eg: by asking 'why is
1/2 + 1/2 = 1/4
incorrect?'; Denominators don't change, - why not? |
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