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PostPosted: Tue Oct 11, 2011 1:41 pm 
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Joined: Thu Oct 06, 2011 12:01 am
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q 67 - 73 any of those, just don't understand the technique.


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PostPosted: Tue Oct 11, 2011 1:53 pm 
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Joined: Thu Feb 24, 2011 12:34 pm
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Is it possible to post one of the questions?


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PostPosted: Tue Oct 11, 2011 2:06 pm 
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Joined: Thu Mar 10, 2011 4:00 pm
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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?


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PostPosted: Tue Oct 11, 2011 2:09 pm 
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If you search Patricia's posts she has written a few about this. I think they are really tricky.


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PostPosted: Tue Oct 11, 2011 2:11 pm 
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Joined: Thu Oct 06, 2011 12:01 am
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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:)


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PostPosted: Wed Oct 12, 2011 8:51 pm 
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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.


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PostPosted: Wed Oct 12, 2011 10:39 pm 
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Joined: Thu Oct 06, 2011 12:01 am
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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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