Presentation on theme: "Rational Numbers. Some Definitions Rational Number: Any number that can be converted into a fraction ( Examples: ¼, 3, 4.25, 0). Fraction: A part of a."— Presentation transcript:
Some Definitions Rational Number: Any number that can be converted into a fraction ( Examples: ¼, 3, 4.25, 0). Fraction: A part of a whole ( ¼, ¾). Mixed Number: A whole number and a fraction (1 ¼ ) Terminating Decimal: A decimal number that stops (3.75, 4.3, 8.3245). Repeating Decimal: A decimal number that has a repeating pattern (3.757575…, 2.345345… )
Adding Decimal Numbers To add decimal numbers, line up the addends by the decimal place and add. Make sure the place values line up properly.
Applying Integer Rules We can apply the same rules for integers to rational decimal numbers. Rule 1: If the signs are the same, add and keep the sign the same. Rule 2: If the signs are different, subtract and keep the sign of the larger number.
Adding Fractions and Mixed Numbers When you add fractions, you must first find a common denominator. We find a common denominator by finding the least common multiple for the denominators of our addends. Make sure your answer is always in lowest terms.