# Addition and Subtraction of Rational Numbers - PowerPoint PPT Presentation

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## Addition and Subtraction of Rational Numbers

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### Addition and Subtraction of Rational Numbers Rational Numbers Number As a Fraction Rational? 5 1.75 .001 -2 Adding and Subtracting Rational Numbers Adding and ... – PowerPoint PPT presentation

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Title: Addition and Subtraction of Rational Numbers

1
Addition and Subtraction of Rational Numbers
2
Rational Numbers
•

Number As a Fraction Rational?
5
1.75
.001
-2
3
• Adding and Subtracting Rational Numbers may
require you to combine numbers that are integers,
decimals, and fractions. You may need to convert
to the same form.
• Use integer add and subtract rules when needed.
• When you add or subtract fractions you must have
a common denominator.
• To add and subtract decimals, be sure the decimal
points are lined up so that the place-values are
also lined up.

4
Find the sum.1) -2.304 (-0.26)
• Line up the decimals and use integer add (same
signs) rule.
• -2.564

Get a common denominator use integer add
(different signs) rule (subtract, take the sign
of the greater value.
5
Find the difference.
3)
Change subtraction to adding the opposite.
Get a common denominator.
Subtract and keep sign of the larger number.
6
Find the difference.
Change subtraction to adding the opposite.
Get a common denominator and subtract. Take sign
of greater value.
7

Change to the same form first Then add
using integer add rules for different signs
(subtract, take sign of greater)
8
Extra Practice Do each problem below on the back
of the rational number chart. Work with a peer