Learn these halves =>
half of 20 = 10
half of 40 = 20
half of 60 = 30
half of 80 = 40
To work out half of 30, partition it into 20 and 10.
Half of 20 = 10, Half of 10 = 5, So half of 30 = 10 + 5 = 15.
Example 1 => To work out half of 50 =>
Partition into 40 and 10 =>
half of 40 = 20
half of 10 = 5
so half of 50 = 20 + 5 = 25
Example 2 =>
To work out half of 70 =>
Partition into 60 and 10 =>
half of 60 = 30 half of 10 = 5 so half of 70 = 30 + 5 = 35
Now try a few practice questions!
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