year 1 - presentation - fractions - week 4 · year 1 - presentation - fractions - week 4 author:...
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YEAR 1
Block 2 – Week 4
Find a half (1)
Find a half (2)
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Step: Find a half (1)
(Practical)
Lesson 1
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Fold a piece of paper in half. Fluency
How did you do this?
Is there more than one way?
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When we split something in half we make
two equal parts.
Fluency
Two halves make a whole.
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Match the shape to its other half. Fluency
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How could we half these objects?
There is only one way of halving these.
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How could we half these objects?
There is more than one way of halving these.
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Something to think about…
In daily life a shape can still be halved even if the two parts
aren’t completely identical.
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Practical:
Cut the following objects on your sheet in half.
Fluency
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True or false?
Explain your answer.
False.
It can only be split in half on way (vertically).
The bear can be split in half in
two different ways.
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Problem
solving
How many different ways can this rectangle be
split in half? 4 ways.
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Step: Find a half (1)
Lesson 2
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Recap: Match the shape to its other half. Fluency
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Which shapes have been halved correctly?Fluency
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Which shapes have been halved correctly?Fluency
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Sort the shapes into the table below.Fluency
Half Not half
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Match the pictures to whether they show half or not.Fluency
Half Not half
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All the above objects have
been split in half correctly.
Do you agree? Explain your answer.
No the pear has not been split in half correctly.
It should be split vertically.
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Problem
solving
Five cakes were halved.
How many halves are there altogether? 10
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Lesson 3Step: Find a half (2)
(Practical)
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To find a half of an amount, we can share equally
between two groups. For example, half of 4 …
Fluency
Half of 4 = _______2
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Fluency
Half of _______ = _______36
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Fluency
Half of 10 = _______5
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Fluency
Half of 14 = _______7
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Half of 8 = ____________
Half of 12 = ____________
Half of 20 = ____________
Fluency
Use counters to help you answer the following:
4
6
10
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Who is correct?
Dom is correct. Half of 14 = 7 and 11 – 4 = 7.
Sue
Dom
Half of 14 is equal to 5 + 3
Half of 14 is equal to 11 - 4
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Problem
solving
Complete the sentences:
Half of _________ = 6
Half of _________ = 10
Half of _________ = 7
12
20
14
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Lesson 4Step: Find a half (2)
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Complete the sentences.
The whole is ______.
Half of ______ = ______.
The whole is ______.
Half of ______ = ______.
2
2 1
6
6 3
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Complete the sentences.
The whole is ______.
Half of ______ = ______.
The whole is ______.
Half of ______ = ______.
8
8 4
10
10 5
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Complete the sentences.
The whole is ______.
Half of ______ = ______.
The whole is ______.
Half of ______ = ______.
14
14 7
18
18 9
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Half of 10 = ____________
Half of 18 = ____________
Half of 16 = ____________
Fluency
Use counters to help you answer the following:
5
9
8
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Which pictures represent a half?
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How many squares need to be shaded to make a
half?
Fluency
2 squares 3 squares
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How many different ways can you shade one half?Fluency
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Lesson 5Step: Consolidation