Mathematics Grade 1
Educational Links

Strand: NUMBER AND OPERATIONS IN BASE TEN (1.NBT)

Extend the counting sequence (Standard 1). Understand place value (Standards 2-3). Use place value understanding and properties of operations to add and subtract (Standards 4-6).

Standard 1.NBT.5

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

• Grade 1 Unit 5: Understanding Place Value (Georgia Standards)
  In this unit, students will understand the order of the counting numbers and their relative magnitudes, use a number line and 99 chart to build understanding of numbers and their relation to other numbers, unitize a group of ten ones as a whole unit: a ten, and understand that a group of ten pennies is equivalent to a dime.
• Great Modeling Tasks in Three Acts - Thirsty Values
  Students are going to discover how many CapriSun pouches are left on the table using place value.
• Number and Operations in Base Ten (1.NBT) - First Grade Core Guide
  The Utah State Board of Education (USBE) and educators around the state of Utah developed these guides for First Grade Mathematics - Number and Operations in Base Ten (1.NBT)
• Number Square
  This task describes an extended instructional sequence whose purpose is to use the 1-100 number square (also called a hundreds chart) to support understanding of adding and subtracting ten from a two-digit number.

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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 Specialists - Patricia  Stephens-French or Molly  Basham and see the Mathematics - Elementary website. For general questions about Utah's Core Standards contact the Director - Jennifer  Throndsen.

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