6.NS.A.1 - Interpret and compute quotients of fractions, and solve word problems involving division of fractions by fractions, e.g., by using visual fraction models and equations to represent the problem.
6.NS.B.4 - Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1-100 with a common factor as a multiple of a sum of two whole numbers with no common factor. For example, express 36 + 8 as 4 (9+2).
6.NS.C.6 - Understand a rational number as point on the number line. Extend number line diagrams and coordinate axes familiar from previous grades to represent points on the line and in the plane with negative number coordinates.
6.NS.C.6a - Recognize opposite signs of numbers as indicating locations on opposite sides of 0 on the number line; recognize that the opposite of the opposite of a number is the number itself, e.g., -(-3) = 3, and that 0 is its own opposite.
6.NS.C.7 - Understand ordering and absolute value of rational numbers.
6.NS.C.7a - Interpret statements of inequality as statements about the relative position of two numbers on a number line diagram. For example, interpret -3 > -7 as a statement that -3 is located to the right of -7 on a number line oriented from left to right.
Lesson 2.1 - Fractions and Decimals
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Study Jams - Decimals and Fraction Equivalents
Lesson 2.2 - Compare and Order Fractions and Decimals
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Study Jams - Ordering Fractions and Decimals
Lesson 2.3 - Multiply Fractions
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Khan Academy - Multiplying fractions
Lesson 2.4 - Simplify Fractions
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Lesson 2.5 - Model Fraction Division
Lesson 2.6 - Estimate Quotients
Lesson 2.7 - Divide Fractions
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Khan Academy - Dividing Fractions Ex. 1
Khan Academy - Dividing Fractions Ex. 2
Lesson 2.8 - Model Mixed Number Division
Lesson 2.9 - Divide Mixed Numbers
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Khan Academy -- Dividing Mixed Numbers
L.7 - Divide fractions and mixed numbers
L.8 - Divide fractions and mixed numbers
Lesson 2.10 - Problem Solving: Fraction Operations