add and subtract real number and fractions with different signs

Algebra
Tutor: None Selected Time limit: 1 Day

i need help adding and subtracting real numbers and fractions with different signs

Jun 11th, 2015

Thank you for the opportunity to help you with your question!

This is how you go about numbers with different signs.

Lets begin with what we know then we complete with the unknowns

let us start with adding 2 numbers

example  +5  add  + 5

When the sign is positive we don't indicate it

=5 +5

=10

Lets go to subtract

a postive 5 added to a negative 5

 5 +( -5)

Let us look at it this way. You have $5 you buy goods worthy $5.  How much are you left with?

You are left with $0

=5 +-5

=0

Lets say you had borrowed $5 and then you Borrow $5 more. How much is the total debt

=-5  +-5

=-10

Supposing you had borrowed $5 and earned $10. How much would you be having?

=-5 + (+10)

=+5

Supposing you had borrowed $10 and earned $5. How much would you be having?

=-10 + (+5)

=-5

Therefore we say you still have a deficit of $5


Lets look at it in the number like which looks like this:


Study the image and let me know if there is further help you need



Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 11th, 2015

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