Missouri Learning Standards
MO.1.NS. Number Sense
1.NS.A. Understand and use numbers up to 120.
1.NS.A.1. Count to 120, starting at any number less than 120.
MO.1.NBT. Number Sense and Operations in Base Ten
1.NBT.A. Understand place value of two-digit numbers.
1.NBT.A.3. Compare two two-digit numbers using the symbols >, = or <.
1.NBT.B. Use place value understanding to add and subtract.
1.NBT.B.5. Add within 100.
MO.1.RA. Relationships and Algebraic Thinking
1.RA.A. Represent and solve problems involving addition and subtraction.
1.RA.A.1. Use addition and subtraction within 20 to solve problems.
1.RA.B. Understand and apply properties of operations and the relationship between addition and subtraction.
1.RA.B.6. Demonstrate that subtraction can be solved as an unknown-addend problem.
1.RA.C. Add and subtract within 20.
1.RA.C.7. Add and subtract within 20.
1.RA.C.8. Demonstrate fluency with addition and subtraction within 10.