Standard - NY-1.OA.1:
Use addition and subtraction within 20 to solve one step word problems involving situations of adding to, taking from, putting together, taking apart, and/or comparing, with unknowns in all positions.

Standard - NY-1.OA.2:
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20.

Standard - NY-1.OA.3:
Apply properties of operations as strategies to add and subtract.

Standard - NY-1.OA.4:
Understand subtraction as an unknown-addend problem within 20.

Standard - NY-1.OA.5:
Relate counting to addition and subtraction.

Standard - NY-1.OA.6a:
Add and subtract within 20. Use strategies such as:

• counting on;
• making ten;
• decomposing a number leading to a ten;
• using the relationship between addition and subtraction; and
• creating equivalent but easier or known sums.

Standard - NY-1.OA.6b:
Fluently add and subtract within 10.

Standard - NY-1.OA.7:
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.

Standard - NY-1.OA.8:
Determine the unknown whole number in an addition or subtraction equation with the unknown in all positions.