SOLUTION: Find the sum or difference. - 5/14 - (- 9/10) Thanks soooooo much! Please work really fast! Happy Holidays!

Algebra ->  Signed-numbers -> SOLUTION: Find the sum or difference. - 5/14 - (- 9/10) Thanks soooooo much! Please work really fast! Happy Holidays!      Log On


   

Question 64994This question is from textbook Pre-Algebra
: Find the sum or difference. - 5/14 - (- 9/10)







Thanks soooooo much! Please work really fast! Happy Holidays! This question is from textbook Pre-Algebra

Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
Find the sum or difference. - 5/14 - (- 9/10) When you subtract a -, you add.
-5/14+9/10 In order to add or subtract fractions, you need a common denominator, if you don't know that 70 is the smallest number that both 14 and 10 go into evenly, you can factor both denominators.
14=2*7
10=2*5
LCD=2*5*7=70
Whatever you do to the denominators you must do to the numerators.
-5%2A5%2F%2814%2A5%29%2B9%2A7%2F%2810%2A7%29
-25%2F70%2B63%2F70
%28-25%2B63%29%2F70 If the signs aren't the same, subtract the numbers and keep the sign of the biggest number.
38%2F70 Both numbers are even, so reduce the top and bottom by 2.
19%2A2%2F%2835%2A2%29
highlight%2819%2F35%29
Happy Calculating!!!