Subtract Fractions with Unlike Denominators

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 1

Tags

CCSS.7.NS.A.1C

Tags

CCSS.7.NS.A.1C

Tags

CCSS.7.NS.A.1C

Tags

CCSS.7.NS.A.1C

(Choose one that is true) When you add or subtract fractions with unlike denominators you..

• Find the greatest common factor to change your denominator

• Change the denominator by picking a random number then divide

• Find the least common multiple to change your denominator

• none of these are true

Tags

CCSS.7.NS.A.1C

Which one is true

• You only simplify when you add fractions

• You simplify all the time unless the fraction is already simplified

• You only simplify when you subtract fractions

What is the the next step to finding this answer?

• Add the numerators (1+1=2)
• Multiply 12 X 1 for both fractions to find a new numerator
  
• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)
• This is a mistake, you don't need to convert to twelfths

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 2/6

• 1/3

• 1/6

• 1/4

Tags

CCSS.4.NF.A.1