Strand: NUMBER AND OPERATIONS IN BASE TEN (3.NBT)

Use place value understanding and properties of operations to perform multi-digit arithmetic. A range of algorithms may be used (Standards 3.NBT.1–3).

Standard 3.NBT.2

Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

• Carlos and Sara Present Their Solutions
This Teaching Channel video shows two students' responses to mental math and student-led solution. (5 minutes)
• Classroom Supplies
In this task students are asked to decide how to spend \$1,000 on supplies and materials for their classroom; students will have to make choices and be careful not to exceed the budget. Students are asked to decide which supplies will benefit the class the most and will compare their choices with other students' choices.
• Grade 3 Mathematics Module 2: Place Value and Problem Solving with Units of Measure (EngageNY)
Module 2 uses place value to unify measurement, rounding skills, and the standard algorithms for addition and subtraction. The module begins with plenty of hands-on experience using a variety of tools to build practical measurement skills and conceptual understanding of metric and time units. Estimation naturally surfaces through application; this transitions students into rounding. In the modules final topics students round to assess whether or not their solutions to problems solved using the standard algorithms are reasonable.
• Mental Math
This video and lesson plan will help students use the strategies of decomposing, jumps of ten, and splitting. (6 minutes)
• Teaching Different Methods To Count Collections
This Teaching Channel video shows students recording and sharing strategies when skip counting. (8 minutes)
• USBE Core Guide for Domain: Number and Operations in Base Ten (3NBT2)
This math guide provides academic vocabulary, instructional strategies, teacher resources, and assessment tasks for the Number and Operations in Base Ten domain.

http://www.uen.org - in partnership with Utah State Board of Education (USBE) and Utah System of Higher Education (USHE).  Send questions or comments to USBE Specialist - Shannon Ference and see the Mathematics - Elementary website. For general questions about Utah's Core Standards contact the Director - DIANA SUDDRETH .
Email:  diana.suddreth@schools.utah.gov

These materials have been produced by and for the teachers of the State of Utah. Copies of these materials may be freely reproduced for teacher and classroom use. When distributing these materials, credit should be given to Utah State Board of Education. These materials may not be published, in whole or part, or in any other format, without the written permission of the Utah State Board of Education, 250 East 500 South, PO Box 144200, Salt Lake City, Utah 84114-4200.