"Can't you split 50 in half?" -- A story about struggling with calculations in a 1-100 number guessing game (2nd grade)

The day after we played a game of narrowing down numbers with "yes/no" questions while waiting for the train (link to article ...
TES

Missing Numbers 1-1000 Worksheets | Number Sequencing Math Practice | Kindergarten 1st 2nd 3rd Grade

Build strong number sense and sequencing skills with these Missing Numbers 1–1000 Worksheets for Kindergarten through 3rd Grade. This printable math resource gives students structured practice ...