Math 7 April 18

Is this a correct answer?

• Yes, the student correctly added.
• No, you cannot add unlike denominators
• No, 5 + 7 is not 12
• No, 2 + 3 is not 5

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

Solve this mixed number equation:
1⅔ + 1⅚

• 3 1/2
• 2 7/6
• 3 7/6
• 2 7/9

• 5/14
• 3/7
• 5/7
• 5/14

• 3/8
• 3/16
• 1/8
• 2/8

7/8 - 7/12

• 7/24

• 1/4

• 7/12

• 4/24

3/4  -  1/2

• 1/3
• 1/4
• 2/3
• 1/5

3/10  -  1/5

• 2/11
• 4/5
• 2/3
• 1/10

Find the difference.  Be sure to simplify.
-¾ - 1/8

• -⅝
• -½
• -⅞
• ⅞

-⁷/₈ - (-⁵/₆)

• 1 ¹⁷/₂₄
• -1 ¹⁷/₂₄
• -¹/₂₄
• ¹/₂₄