2.NS.3

The student will use mathematical reasoning and justification to solve contextual problems that involve partitioning models into equal-sized parts (halves, fourths, eighths, thirds, and sixths).

2.NS.3.aModel and describe fractions as representing equal-size parts of a whole.2.NS.3.bDescribe the relationship between the number of fractional parts needed to make a whole and the size of the parts (i.e., as the whole is divided into more parts, each part becomes smaller).2.NS.3.cCompose the whole for a given fractional part and its value (in context) for halves, fourths, eighths, thirds, and sixths (e.g., when given 1/4, determine how many pieces would be needed to make 4/4).2.NS.3.dUsing same-size fraction pieces, from a region/area model, count by unit fractions up to two wholes (e.g., zero one-fourths, one one-fourth, two one-fourths, three one-fourths, four one-fourths, five one-fourths; or zero-fourths, one-fourth, two-fourths, three-fourths, four-fourths, five-fourths).2.NS.3.eGiven a context, represent, name, and write fractional parts of a whole for halves, fourths, eighths, thirds, and sixths using:2.NS.3.fCompare unit fractions for halves, fourths, eighths, thirds, and sixths using words (greater than, less than or equal to) and symbols (>, <, =), with region/area and length models.
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