Please Help! Familiarisation test 1

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dreams
Posts: 122
Joined: Thu Oct 06, 2011 1:01 am

Please Help! Familiarisation test 1

Post by dreams »

q 67 - 73 any of those, just don't understand the technique.
svg123
Posts: 250
Joined: Thu Feb 24, 2011 1:34 pm

Re: Please Help! Familiarisation test 1

Post by svg123 »

Is it possible to post one of the questions?
SingleDad
Posts: 80
Joined: Thu Mar 10, 2011 5:00 pm

Re: Please Help! Familiarisation test 1

Post by SingleDad »

Hi

These are the ones where you need to find out how they made the middle number (the one in square brackets), using the two numbers on the sides.

So, question 67 for example.

The 86 in the square brackets is made by multiplying the side numbers by 2, and then adding them together; ie (28 x 2) + (15 x 2).

The 94 is made in the same way; ie (12 x 2) + (35 x 2)

So then, using the same method, we need to work out what the middle number should be for the last set. The answer is (28 x 2) + (17 x 2) = 90.

Does this make sense?
scary mum
Posts: 8840
Joined: Mon Mar 15, 2010 3:45 pm

Re: Please Help! Familiarisation test 1

Post by scary mum »

If you search Patricia's posts she has written a few about this. I think they are really tricky.
scary mum
dreams
Posts: 122
Joined: Thu Oct 06, 2011 1:01 am

Re: Please Help! Familiarisation test 1

Post by dreams »

SingleDad wrote:Hi

These are the ones where you need to find out how they made the middle number (the one in square brackets), using the two numbers on the sides.

So, question 67 for example.

The 86 in the square brackets is made by multiplying the side numbers by 2, and then adding them together; ie (28 x 2) + (15 x 2).

The 94 is made in the same way; ie (12 x 2) + (35 x 2)

So then, using the same method, we need to work out what the middle number should be for the last set. The answer is (28 x 2) + (17 x 2) = 90.

Does this make sense?
o, yes...thank you:)
bucks mum1
Posts: 191
Joined: Wed Apr 02, 2008 5:20 pm

Re: Please Help! Familiarisation test 1

Post by bucks mum1 »

My son found it easier to add the two outside numbers together and then double the total. I know it is exactly the same outcome just he found it easier to see the answer by following that method.
dreams
Posts: 122
Joined: Thu Oct 06, 2011 1:01 am

Re: Please Help! Familiarisation test 1

Post by dreams »

bucks mum1 wrote:My son found it easier to add the two outside numbers together and then double the total. I know it is exactly the same outcome just he found it easier to see the answer by following that method.
thank you:)
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