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Subtracting Rational Numbers

Subtracting Rational Numbers. Essential Question: How do you subtract rational numbers? Unit 1-3. Subtracting Rational Numbers. Vocabulary Difference- the answer to a subtraction problem. Subtracting. To subtract a positive number move left on the number line.

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Subtracting Rational Numbers

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  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. Subtracting • To 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. Subtracting • Subtraction is the opposite of adding, or adding the opposite, so change subtraction to adding the opposite

  5. Rule to remember • When you are subtracting: keep the first number, change the subtraction sign to addition, change the sign of the second number. K C C KEEP CHANGE CHANGE FOLLOW 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. Subtracting • How is subtracting rational numbers different from adding rational numbers?

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