New Mexico Standards
NM.N. Number and Operations: Students will understand numerical concepts and mathematical operations.
K-4.N.2. Understand the meaning of operations and how they relate to one another.
4.N.2.1. Demonstrate an understanding of and the ability to use:
4.N.2.1.a. Standard algorithms for the addition and subtraction of multi-digit numbers
K-4.N.3. Compute fluently and make reasonable estimates.
4.N.3.2. Add, subtract, and multiply up to two double-digits accurately and efficiently.