Operations (Early Addition & Subtraction)
Combining and separating small quantities using concrete objects and mental strategies.
Examples & Achievements
- Solves simple addition with objects ("3 blocks and 2 more blocks makes 5")
- Solves simple subtraction with objects ("5 cookies, ate 2, now there are 3")
- Decomposes numbers within 10 ("5 is 3 and 2, or 4 and 1")
- Uses fingers to add and subtract within 5
- Understands "putting together" and "taking away" concepts
How to Measure
- Solves 3 out of 5 addition problems within 5 using objects
- Solves 3 out of 5 subtraction problems within 5 using objects
- Decomposes a given number (5-10) into two parts
- Common Core K.OA assessment items
Sources (3)
- Common Core K
- Montessori
- HighScope