**Our Unit Essential Question is – **

**“What does Addition and Subtraction do to Numbers?”**

The concepts covered in this chapter deal with basic addition and subtraction facts and relationships.

**VOCABULARY** words your child will use within this unit are: addition sentence, is equal to, =, plus, +, sum, add, add to,putting together, zero, order, addends, minus, – , difference, subtraction sentence, subtract, compare, count on, doubles, doubles plus one, doubles minus one, make a ten, count back, break apart, related facts, unknown

By the end of this unit, your child should UNDERSTAND:

- There is a relationship between addition and subtraction.
- Addition means combining numbers to find the sum.
- When adding, the sum will be greater (than the addends)
- Subtraction means taking away to find the difference.
- When subtracting, the difference will be less.
- There is more than one way to solve a word problem.
- A symbol can take the place of a number.
- Numbers represent a value and symbols represent an operation.
- Fluency is important because it will help them become efficient problem solvers.

Our **Learning Goals** for this unit will be:

- I can add and subtract in ways that make sense to me.
- I can solve addition and subtraction word problems up to 20 in a way that makes sense to me.
- I can write an equation using the correct symbols to solve word problems up to 20.
- I can solve addition story problems up to 20 using a box for the missing addend.
- I can add two numbers in any order to get the same sum.