Third Grade

Third grade students use represent and solve multiplication and division problems in situations involving equal groups, arrays, and measurement quantities by using drawing and equations. Students will also solve two-step word problems using the four operations for problems posed with whole numbers and having whole number answers. By the end of grade 3, students know from memory the products of two single-digit numbers and related division facts.

Third graders use place value understanding to round whole numbers to the nearest 10 or 100. Students fluently add and subtract within 1,000 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Third grade students develop understanding of fractions as numbers as both the quantity formed by 1 part when a whole is partitioned into equal parts and a fraction as a number on the number line. Students understand that two fractions are equivalent if they are the same size or the same point on the number line and recognize and generate simple equivalent fractions. Work also includes comparing two fractions with the same numerator or the same denominator by reasoning about their size.

Third graders tell and write time to the nearest minutes and measure time intervals in minutes. Students also solve word problems involving addition and subtraction of time intervals. Work at this grade also includes measuring and estimating liquid volume and masses of objects using standard metric units. Students understand concepts of area and relate area to the operations of multiplication and addition. Students recognize perimeter and solve real-world mathematical problems involving perimeters of polygons.