Presentation on theme: "Subtracting Rational Numbers"— Presentation transcript:
1 Subtracting Rational Numbers Essential Question:How do you subtract rational numbers?Unit 1-3
2 Subtracting Rational Numbers Vocabulary Difference- the answer to a subtraction problem
3 SubtractingTo subtract a positive number move left on the number line.To subtract a negative number move right on the number line.Absolute numbers can never be negative.
4 SubtractingSubtraction is the opposite of adding, or adding the opposite, so change subtraction to adding the opposite
5 Rule to rememberWhen you are subtracting: keep the first number, change the subtraction sign to addition, change the sign of the second number.K C CKEEP CHANGE CHANGEFOLLOW RULES FOR ADDITION OF RATIONAL NUMBERS
6 Subtracting To subtract a number add its opposite. p - q = p + (-q) 3 – 4 = 3 + (-4)Remember when adding two rational numbers with different signs find the difference of there absolute value. Then use the sign of the rational number with the greater value.
7 SubtractingHow is subtracting rational numbers different from adding rational numbers?