# K.4 Understanding Addition and Subtraction

## Unit Goals

• Students relate counting to addition and solve addition and subtraction story problems within 10.

### Section A Goals

• Understand addition as putting together and subtraction as taking from.

### Section B Goals

• Represent and solve Add To, Result Unknown and Take From, Result Unknown story problems within 10.

### Section C Goals

• Find the value of addition and subtraction expressions within 10.
• Relate addition and subtraction expressions to story problems.

### Glossary Entries

• above

$$4 + 3$$

Four plus three

• below

• beside

• circle

• expression

$$6 + 4$$

$$3 - 3$$

• fewer

• less

3 is less than 9

• longer

The straw on the top is longer than the straw on the bottom.

• more

• next to

• number writing reference
 1 one 2 two 3 three 4 four 5 five
 6 six 7 seven 8 eight 9 nine 10 ten

• rectangle

• shorter

The straw on the bottom is shorter than the straw on the top.

• subtract

$$5 - 2$$

Five minus two

• triangle