Grade 1 - Computational Fluency
Standard 1.CF.2.4 - Practice subtracting zero and all from a number. Recognize the similar numbers in subtracting all and zero.
Included Skills: Subtraction
Addition and subtraction to 20 (understanding of operation and process) • decomposing 20 into parts • mental math strategies: - counting on - making 10 - doubles • Addition and subtraction are related. • whole-class number talks • nature scavenger hunt in Kaska Counting Book (yukon-ed-show-me-your-math.wikispaces.com/file/detail/Kaska Counting Book.pdf)