Colorado Academic Standards for Mathematics (2010)
4.1.2.a.iii
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Compare two fractions with different numerators and different denominators, and justify the conclusions.
Translations
Common Core State Standards for Math
Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. <em>For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.</em>