Grade 3 Number & OperationsÔÇöFractions × 3.NF.2. Understand a fraction as a number on the number line; represent fractions on a number line diagram. View interactive math games for all Grade 3 Common Core Standards 3.NF.2. Understand a fraction as a number on the number line; represent fractions on a number line diagram. ? × 3.NF.1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b View interactive math games for all Grade 3 Common Core Standards 3.NF.1. Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b ? × 3.NF.3. Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size. View interactive math games for all Grade 3 Common Core Standards 3.NF.3. Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size. ?