MHB How to Simplify Fractions with Brackets

  • Thread starter Thread starter unknown1
  • Start date Start date
  • Tags Tags
    Fractions
AI Thread Summary
To simplify the expression 19/20 - (1/2 - 3/10), start by solving the brackets first. Calculate 1/2 - 3/10 by finding a common denominator, which is 10, resulting in 5/10 - 3/10. This simplifies to 2/10 or 1/5. Then, subtract this result from 19/20, which can also be expressed with a common denominator of 20 for easier calculation. The final answer can be derived from these steps.
unknown1
Messages
1
Reaction score
0
how do I work out this problem?19/20-(1/2-3/10)
 
Mathematics news on Phys.org
unknown said:
how do I work out this problem?19/20-(1/2-3/10)
With PEDMAS (or any of it's twins) you always start with what's inside the brackets. In this case
[math]\frac{1}{2} - \frac{3}{10}[/math]

Get a common denominator. In this case it is 10. So we have
[math]\frac{1}{2} \cdot \frac{5}{5} - \frac{3}{10} = \frac{5}{10} - \frac{3}{10}[/math]

Can you finish from here?

(As a slightly more advanced tip you might want to think about the common denominator of all three fractions. That would be 20.)

-Dan
 
Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...

Similar threads

Replies
6
Views
221
Replies
2
Views
2K
Replies
1
Views
1K
Replies
7
Views
2K
Replies
4
Views
1K
Replies
2
Views
2K
Replies
5
Views
1K
Back
Top