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Subject Area - CC.2:
Mathematics
  • Standard Area - CC.2.1: Numbers and Operations
  • Grade Level - CC.2.1.6: GRADE 6
Standard - CC.2.1.6.D.1

Understand ratio concepts and use ratio reasoning to solve problems.

  • Anchor Descriptor - M06.A-R.1.1 Represent and/or solve realworld and mathematical problems using rates, ratios, and/or percents.
    • Eligible Content - M06.A-R.1.1.1 Use ratio language and notation (such as 3 to 4, 3:4, 3/4) to describe a ratio relationship between two quantities. Example 1: “The ratio of girls to boys in a math class is 2:3 because for every 2 girls there are 3 boys.” Example 2: “For every five votes candidate A received, candidate B received four votes.”
    • Eligible Content - M06.A-R.1.1.2 Find the unit rate a/b associated with a ratio a:b (with b ≠ 0) and use rate language in the context of a ratio relationship. Example 1: “This recipe has a ratio of 3 cups of flour to 4 cups of sugar, so there is 3/4 cup of flour for each cup of sugar.” Example 2: “We paid $75 for 15 hamburgers, which is a rate of $5 per hamburger.”
    • Eligible Content - M06.A-R.1.1.3 Construct tables of equivalent ratios relating quantities with whole-number measurements, find missing values in the tables, and/or plot the pairs of values on the coordinate plane. Use tables to compare ratios.
    • Eligible Content - M06.A-R.1.1.4 Solve unit rate problems including those involving unit pricing and constant speed. Example: If it took 7 hours to mow 4 lawns, then at that rate, how many lawns could be mowed in 35 hours? At what rate were lawns being mowed?
    • Eligible Content - M06.A-R.1.1.5 Find a percent of a quantity as a rate per 100 (e.g., 30% of a quantity means 30/100 times the quantity); solve problems involving finding the whole, given a part and the percentage.
Standard - CC.2.1.6.E.1

Apply and extend previous understandings of multiplication and division to divide fractions by fractions.

  • Anchor Descriptor - M06.A-N.1.1 Solve real-world and mathematical problems involving division of fractions.
    • Eligible Content - M06.A-N.1.1.1 Interpret and compute quotients of fractions (including mixed numbers), and solve word problems involving division of fractions by fractions. Example 1: Given a story context for (2/3) ÷ (3/4), explain that (2/3) ÷ (3/4) = 8/9 because 3/4 of 8/9 is 2/3. (In general, (a/b) ÷ (c/d) = (a/b) × (d/c) = ad/bc.) Example 2: How wide is a rectangular strip of land with length 3/4 mi and area 1/2 square mi? Example 3: How many 2 1/4-foot pieces can be cut from a 15 1/2-foot board?
Standard - CC.2.1.6.E.2

Identify and choose appropriate processes to compute fluently with multi-digit numbers.

  • Anchor Descriptor - M06.A-N.2.1 Compute with multi-digit numbers using the four arithmetic operations with or without a calculator.
    • Eligible Content - M06.A-N.2.1.1 Solve problems involving operations (+, –, ×, and ÷) with whole numbers, decimals (through thousandths), straight computation, or word problems.
  • Anchor Descriptor - M06.A-N.2.2 Apply number theory concepts (specifically, factors and multiples).
    • Eligible Content - M06.A-N.2.2.1 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.
    • Eligible Content - M06.A-N.2.2.2 Apply the distributive property to express a sum of two whole numbers, 1 through 100, with a common factor as a multiple of a sum of two whole numbers with no common factor. Example: Express 36 + 8 as 4(9 + 2).
Standard - CC.2.1.6.E.3

Develop and/or apply number theory concepts to find common factors and multiples.

  • Standard Area - CC.2.1: Numbers and Operations
  • Assessment Anchor - A1.1.1:

    Operations with Real Numbers and Expressions

    • Eligible Content - A1.1.1.1.1 Compare and/or order any real numbers (rational and irrational may be mixed).
    • Eligible Content - A1.1.1.1.2

      Simplify square roots (e.g., √24 = 2√6).

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