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Which expression represents half the sum of five and a number b?
Wiki User
∙ 6y ago
First write down '5 + b'
NB in algebra you must always show the plus sign.
Next put the '5 + b' in brackets. ; (5 + b)
When you require half of this value , you are dividing by '2' . So it is written as
(5 + b)/2
NNB the 'slash sign ; '/' represents divide in algebra.
NNNB Do not write 5 + b/2 , because this means the 'whole number '5' is added to half of 'b' only/ You must use the brackets.
e.g.
Let 'b' = 7
So '5 + 7' = ( 5 + 7) =>
( 5 + 7) / 2
#Remember the rule in maths ; you do inside the brackets first.
Hence ( 5 + 7) / 2 = 12 /2 Then divide 12/2 = 6 The Answer.
For the other method you will a completely different answer.
5 + 7/2 = 5 + 3.5 = 8.5
Hope that helps!!!!!
lenpollock
Wiki User
∙ 6y agoThe expression which represents half the sum of five and a number b is (b+5)/2.
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