Reporting Category: Number and Operations in Base Ten Standard: CCSS.Math.Content.3.NBT.A.1 - Use place value understanding to round whole numbers to the nearest 10 or 100. [Note: A range of algorithms may be used.]
Item Description: Solve problems by rounding three-digit numbers to the nearest 10 and 100, with explanation and justification.

This table shows the number of people who went to the school play on three different days.

Part A

Round to the nearest ten the number of people who went to the school play on each of the three days. Show or explain how you got each of your answers.

Enter your answers and your work or explanation in the space provided.

Part B

Isaac is rounding the three numbers in the table to the nearest hundred. He thinks two of the numbers will be the same after they are rounded. Show or explain why Isaac's reasoning is correct.

Enter your work or explanation in the space provided.

Scoring Guide and Sample Student Work Select a score point in the table below to view the sample student response.

The student response demonstrates an exemplary understanding of the Numbers and Operations in Base Ten concepts involved in using place value understanding to round whole numbers to the nearest 10 or 100. The student rounds whole numbers to the nearest 10 or 100 in a real-world problem and critiques the reasoning of others.

The student response demonstrates a fair understanding of the Numbers and Operations in Base Ten concepts involved in using place value understanding to round whole numbers to the nearest 10 or 100. While some aspects of the tasks are completed correctly, others are not. The mixed evidence provided by the student merits 1 point.

The student response contains insufficient evidence of an understanding of the Numbers and Operations in Base Ten concepts involved in using place value understanding to round whole numbers to the nearest 10 or 100 to merit any points.

Note: There are 2 sample student responses for Score Point 2.