Adding and Subtracting Negative and Positive Fractions and Mixed Numbers

• -4/5

• -2/10

• -2/5

• -3/10

Tags

CCSS.7.NS.A.1C

What has to be done before you can add or subtract fractions and mixed numbers?

• Make sure there are common denominators.

• Reduce the fractions.

• Change any mixed numbers to improper fractions.

• Make sure the top numbers match.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What would you do first on this problem: \frac{9}{12}+\ \frac{2}{6}

• Simplify the first fraction.

• Go ahead and add them (they're ready to go!)

• Get common denominators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

(-2 ⅚) + 3 ⅔

• ⅚

• - ⅚

• 6 ½

• -6 ½

Tags

CCSS.7.NS.A.1C

-8⅚ + -2⅕

• -11 1/30

• 11 1/30

• -10 6/11

• 10 6/11

Tags

CCSS.7.NS.A.1C

(-7 ⅗) - 8 ⅛

• - 19/40

• 16 29/40

• -15 29/40

• other

Tags

CCSS.7.NS.A.1C

3/8 - (-1/4)

• 5/8

• 3/4

• 4/8

• -5/8

Tags

CCSS.7.NS.A.1C

(-7 ⅗) - 8 ⅛

• - 19/40

• 16 29/40

• -15 29/40

• other

Tags

CCSS.7.NS.A.1C

 3 ⅓ + (-2¾)

• 7/12

• -7/12

• 1 5/12

• -1 5/12

Tags

CCSS.7.NS.A.1C

Remember to watch the signs of the fractions!

• -43/45

• 43/45

• -867/45

• 867/45

Tags

CCSS.7.NS.A.1C