Missouri Learning Standards
MO.2.NBT. Number Sense and Operations in Base Ten
2.NBT.B. Use place value understanding and properties of operations to add and subtract.
2.NBT.B.6. Demonstrate fluency with addition and subtraction within 100.
2.NBT.B.8. Add or subtract within 1000, and justify the solution.
2.NBT.C. Represent and solve problems involving addition and subtraction.
2.NBT.C.11. Write and solve problems involving addition and subtraction within 100.
MO.2.RA. Relationships and Algebraic Thinking
2.RA.A. Add and subtract within 20.
2.RA.A.1. Demonstrate fluency with addition and subtraction within 20.