2.NBT.B.6
Add up to four two-digit numbers using strategies based on place value and properties of operations.
Summative Assessment Task
Students determine how many puzzle pieces are left to finish a puzzle.
Instructional Tasks/Formative Assessments
Given a number of boxes put in a truck, students determine how many more boxes need to be put in the truck.
Students determine if there are enough apples for all the students in grade 2, after several dozen more apples are brought to the school.
Students find different combinations of coins that add up to 75 cents.
Students determine how many stuffed dogs are in a stuffed animal collection.