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I'm really bad at non-calculator questions - how can I get better at calculations?

Practice is the best way - that being said there are some tricks you can use.It's often easier to change the way you represent a number. For example, consider 99 x 8799 is very close to 100, which is a much ...
JS
Answered by John S. • Maths tutor
4608 Views

The formula for the volume of a cone is V=1/3πR^2H. If R=6 and H=5, work out its volume in terms of π.

V = 1/3π x (6x6) x 5V = 1/3π x 36 x 5V = 1/3π x 180V = 60π
FC
Answered by Felicity C. • Maths tutor
3488 Views

Rearranging formulae

Sometimes in maths you will encounter equations with an unknown value, such as X+3=7. Though this is a very simple example that you can probably do in your head without thinkig much, knowing the principles o...
NS
Answered by Natalia S. • Maths tutor
2850 Views

4(3x-7) = 8

First multiply out the bracketsMultiply each component within the bracket by 4 (4 x 3x) + (4 x -7) = 812x - 28 = 8 Now you want to ensure you have the x's on their ownYou can eliminate the -28 by adding 28 t...
JH
Answered by Jack H. • Maths tutor
3062 Views

A linear sequence starts a + 2b, a + 6b, a + 10b, …….. …….. The 2nd term has value 8. The 5th term has value 44. Work out the values of a and b.

First we need to find the fourth and fifth term. So between first and second term we've added 4b, the same between the second and third term. To get to the fourth term we'd add 4b again to get a+14b, then ad...
KG
Answered by Khadijah G. • Maths tutor
3197 Views