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).Standard 1.NBT.2
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
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