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Mathematics Grade 1
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).
Subtract multiples of 10 in the range 10–90 from multiples of 10 in the range 10–90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.
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 .