Kindergarten - Addition and Subtraction Unit
The Addition and Subtraction Unit involves understanding the processes of addition and subtraction in order to solve problems and answer questions such as—
- If we put the beans in this jar with the beans in this bowl, how many beans will there be?
- If we start with this many beans and give three beans away, how many beans are there now?
- How do you know your answer makes sense?
- How did you know to add or subtract?
- What happened when you joined your numbers/separated your numbers?
- How do you know you counted correctly for a total of ten?
Math Concepts and Skills:
The student develops an understanding of addition and subtraction situations in order to solve problems.
The student:
- uses the action of joining to represent addition and the action of separating to represent subtraction.
- uses objects and pictures to solve word problems with sums up to 10 and differences within 10.
- explains the strategies used to solve problems involving adding and subtracting within 10 using spoken words, objects, pictures, and equations.
- finds the number that when added to a given number equals a sum of ten.
Summative Assessment Task
Students determine how many more pictures need to be drawn, when given a number of animal pictures.
Students determine how many crackers are left on a plate after five crackers have been eaten. (Subtraction, 0-10)
Students identify the number of cat ears on two cats.
Students determine how many baseballs are left on a shelf. (Subtraction, 0-5)
Instructional Tasks/Formative Assessments
Students determine how many more dinosaur books are needed for a total of ten books.
Students determine how many of Taylor's beads are blue. (Subtraction, 0-10)
Students determine how many beads were in a bowl to start with, after beads are taken out of the bowl.
Students determine how many balls are left in a box once two balls have been removed. (Subtraction, 0-5)
Students determine how many towels Emma needs to fold after doing her homework.
Students determine how many crayons were in a bowl to start with, after some crayons have been removed. (Subtraction, 0-10)
Students determine if there are enough chairs for all ten students in the Art Club.
Students determine how many pages Jayden read after lunch.
Students determine how many carrots were taken from a bag if only one carrot remains. (Subtraction, 0-5)
Students determine how many animal feet Henry sees in a field.