About This Lesson
Counting on from smaller number to find the difference, and comparing two stacks to find how many more. Aligned with Common Core Standard: K.OA.1 Operations and Algebraic Thinking: Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from. Aligned with Common Core Standard: 1.OA.6 Operations and Algebraic Thinking: Add and subtract within 20.
Excellent presentation, lots of work, clear objectives and a range of answers