Add and Subtract Positive and Negative Fractions and Mixed Numbers

Add and Subtract Positive and Negative Fractions and Mixed Numbers SWBAT add and subtract positive and negative fractions; add and subtract positive and negative mixed numbers

Review: • Adding integers: • integers with like signs: add the absolute values and keep the sign • integers with unlike signs: subtract the absolute values and use the sign of the larger absolute value. • Subtracting integers: • rewrite it as an addition problem by adding the additive inverse of the subtrahend. Follow addition rules.

Adding and Subtracting Fractions • When adding fractions you need to have common denominator. • What is the LCD for 4/5 and 7/8?

Examples • -5/16 + (-5/8) • 3/5 + (-4/15) • 7/10 – 4/5 • -2/10 – 11/20 • 1 3/10 – (-2/5) • -2 7/12 + (-3 5/8) • 1 3/5 + (-6 7/10) • -3 5/6 – (-1 ¾)

Try These • -3/8 + (-5/16) • -6/16 + -5/16 • -11/16 • 3/5 + (-4/15) • 9/15 + (-4/15) • 5/15 = 1/3 • 26 ¼ - (-5 3/8) • 26 2/8 + 5 3/8 • 31 5/8

Add and Subtract Positive and Negative Fractions and Mixed Numbers