## Reflection: Diverse Entry Points Smoothing out subtraction - Section 3: Closing

Some students can quickly transfer from addition to subtraction. They understand the fact that subtraction is a reverse process. Other students are still struggling with the concept of taking away, or making something smaller. The number line allows students to count the process, and see where they are starting, and how their answer is smaller. If students can internalize the fact that subtraction yields a smaller number and addition yields a larger number, their concept of number will be strengthened.

Do not assume that children understand what is happening in subtraction. Second grade should be a year to build a strong foundation for the skills required by Common Core in third grade. Make sure your students demonstrate a strong concept of number, before moving on. Don't trade memorization for understanding.

Different Understandings
Diverse Entry Points: Different Understandings

# Smoothing out subtraction

Unit 6: Everything in Its Place
Lesson 9 of 14

## Big Idea: Students demonstrate comfort with addition, but show less ease with subtraction. Repeated practice with subtraction is necessary to build fluency.

Print Lesson
Standards:
Subject(s):
35 minutes

### Beth McKenna

##### Similar Lessons

###### Cover Up
1st Grade Math » Counting by Groups
Big Idea: Yesterday we added it up and today we cover it up. Students will work in pairs as they cover random numbers on a number grid and ask their partner to figure out which numbers are Covered Up!
Favorites(6)
Resources(17)
Waitsfield, VT
Environment: Suburban

###### Domino Addition: Understanding the Part/Part/Whole Relationship
2nd Grade Math » Addition and Subtraction Basic Training
Big Idea: The big idea of this lesson is the understanding that addition can be represented as parts of a whole and that we can use addition sentences to represent those parts.
Favorites(22)
Resources(20)
Pepperell, MA
Environment: Rural

###### It's As Basic As That
3rd Grade Math » Understanding Multiplication
Big Idea: Students need to master the basic operations. The common core suggests that all four operations are mastered by the end of third grade. This lesson will help determine where to start and what to do next.
Favorites(15)
Resources(11)
Troy, MI
Environment: Suburban