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Mathematics: Post your doubts here!

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so for example, if it says 5 cm to the nearest cm, divide 1 by 2 and u get 0.5cm. for upper bound add 0.5cm to 5cm and for lower bound subtract 0.5cm from 5cm.
Another example, if it says that 5m to the nearest cm, 1cm divide by 2, u get 0.5 cm . remember that it said to the nearest cm so when dividing 1 by 2 u will get 0.5 in cm. and the actual value is 5 in metres. so when adding or subtracting first change this 0.5cm to metres :)

Thnx for the reply..but my question is different.Pls refer May/June 2001 paper 2 q11 b)
 
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I just got to know about this group and i am new here.....
I have my IGCSE maths pp2 Morrow....and i have a ton of unsolved queries
I hope u guys can help me with my problems....

In October November 2004 paper 2, Question 16... i dont understand how is p :54, q: 51 and r: 78
PLZZ Helllppp

In May June 2004, Question 20(ii) i dont understand how to get the values of p and q

How do i solve this inequality
3<2x-5<7

And the last one... what r rational and irrational numbers?? differences b/w them??
 
Messages
602
Reaction score
687
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103
I just got to know about this group and i am new here.....
I have my IGCSE maths pp2 Morrow....and i have a ton of unsolved queries
I hope u guys can help me with my problems....

In October November 2004 paper 2, Question 16... i dont understand how is p :54, q: 51 and r: 78
PLZZ Helllppp

In May June 2004, Question 20(ii) i dont understand how to get the values of p and q

How do i solve this inequality
3<2x-5<7

And the last one... what r rational and irrational numbers?? differences b/w them??
these might help u :)
 

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Messages
602
Reaction score
687
Points
103
I just got to know about this group and i am new here.....
I have my IGCSE maths pp2 Morrow....and i have a ton of unsolved queries
I hope u guys can help me with my problems....

In October November 2004 paper 2, Question 16... i dont understand how is p :54, q: 51 and r: 78
PLZZ Helllppp

In May June 2004, Question 20(ii) i dont understand how to get the values of p and q

How do i solve this inequality
3<2x-5<7

And the last one... what r rational and irrational numbers?? differences b/w them??
Question#20 (ii)
 

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Messages
602
Reaction score
687
Points
103
I just got to know about this group and i am new here.....
I have my IGCSE maths pp2 Morrow....and i have a ton of unsolved queries
I hope u guys can help me with my problems....

In October November 2004 paper 2, Question 16... i dont understand how is p :54, q: 51 and r: 78
PLZZ Helllppp

In May June 2004, Question 20(ii) i dont understand how to get the values of p and q

How do i solve this inequality
3<2x-5<7

And the last one... what r rational and irrational numbers?? differences b/w them??
 

Attachments

  • DSC_0091.jpg
    DSC_0091.jpg
    333.4 KB · Views: 7
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