Fraction & Decimal Operations

To add or subtract like fractions you

• add or subtract the numerators and the denominators

• cross cancel

• cross multiply

• add or subtract the numerators and keep the denominator the same

To multiply fractions you

• look to see if you can cross cancel then multiply straight across

• use cross products

• multiply the numerators and keep the denominators the same

• flip the second fraction then multipy

Tags

CCSS.5.NF.B.4

CCSS.5.NF.B.5

CCSS.5.NF.B.6

To divide fractions you

• change it to multiplication

• cross cancel

• flip the first fraction then multiply

• flip the second fraction then multiply

Tags

CCSS.5.NF.B.3

CCSS.5.NF.B.7

• 13/3
• 13/27
• 9/39
• 3/13

Tags

CCSS.6.NS.A.1

• 5/6
• 3/15
• 3/8
• 2/15

Tags

CCSS.5.NF.B.4

CCSS.5.NF.B.5

CCSS.5.NF.B.6

• 1/6
• 2/12
• 8/9
• 8/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

• 8  ¹/35
• 8  ¹²/35
• 9
• 8  ⁴/₁₅

Tags

CCSS.5.NF.B.6

3 5/8 + 2 3/4

• 5 11/8 = 6 3/8
• 5 8/12 = 5 2/3
• 5 8/8 = 6
• 5 3/8

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

5 ÷ ⅕

• ⅕
• 1/25
• 5
• 25

Tags

CCSS.5.NF.B.3

CCSS.5.NF.B.7

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

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2