# Operations with Rational Numbers

by
**lgoldfarb05**

Last updated 4 years ago

** Discipline: **

Elementary School ** Subject: **

Pre - Algebra
** Grade:**

7

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Addition and Subtraction of Rational NumbersBy Lauren Goldfarb

Rational Numbers

How to Solve:

Practice Here Too:http://www.ixl.com/math/grade-7/add-and-subtract-rational-numbers

To find the sum of two rational numbers:Ex: 6 1/2 + -2Using a number line, place the tail of an arrow at -2 and count 6 and 1/2 units to the right to arrive at 4 1/2 which is the sum of 6 1/2 and -2.To find the difference of two rational numbers:Ex: 6 1/2 - 2Rewrite the difference as a sum 6 1/2 + (-2) and solve the same as above. You will arrive at the sum of 4 1/2 again.

A rational number is a number that can be made by dividing two integers.

The rules for adding and subtracting integers apply to all rational numbers.

Practice Here:http://www.softschools.com/quizzes/math/adding_and_subtracting_rational_numbers/quiz3284.html

Helpful Website:http://www.mathsisfun.com/algebra/rational-numbers-operations.html

Addition

Subtraction

Rational Numbers

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