South Carolina Standards & Learning
SC.1.NSBT. Number Sense and Base Ten
1.NSBT.1. Extend the number sequence to:
1.NSBT.1c. Read, write and represent numbers to 100 using concrete models, standard form, and equations in expanded form.
1.NSBT.2. Understand place value through 99 by demonstrating that:
1.NSBT.2a. Ten ones can be thought of as a bundle (group) called a “ten”.
1.NSBT.2b. The tens digit in a two-digit number represents the number of tens and the ones digit represents the number of ones.
1.NSBT.2c. Two-digit numbers can be decomposed in a variety of ways (e.g., 52 can be decomposed as 5 tens and 2 ones or 4 tens and 12 ones, etc.) and record the decomposition as an equation.