1.NBT.C.4
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Summative Assessment Task
Students determine how many worms Dion finds to go fishing with his friends.
Instructional Tasks/Formative Assessments
Students determine how many pages Jamal read in his book about dogs.
Given the number of paintbrushes the art teacher found in a can and on a shelf, students determine if there are enough paintbrushes for the class.
Students determine how many total grapes Pete the parrot ate from a bowl.
Students determine how many pieces of wood Kiara sees in her stack after she adds seven more pieces to the stack.