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.
Instructional Tasks/Formative Assessments
Students determine how many shots need to be given to two puppies. (Addition, 0-5)
Students identify how many little kittens need to find homes. (Subtraction, 0-10)
Students determine how many more sandwiches need to be made to have a total of ten sandwiches.
Students determine how many pizzas Anthony made all together, when given the numbers of pizzas made each day.
Students determine if Christina has found all her kittens.
Students determine how many ears Mary sees.
Students determine if each girl can have three pieces of paper, when given a number of pieces of purple paper. (Addition, 0-10)
Students count to find out how many total pumpkins were picked.
Students determine how many stamps Mrs. Brit's needs to mail some thank-you letters.