Flipped Math Lesson
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: 1
Lesson Length: 45 minutes
Keywords/Tags: adding, subtracting, 20
Lesson Description: In this lesson the standard that will be covered is MA.1.AR.1.2 and the standard includes solving an addition and subtraction real-world problems using objects, drawings or equations to represent the problem. The second standard this lesson touches on is MA.1.NSO.2.2, which includes, Add two whole numbers with sums from 0 to 20, and subtract using related facts with procedural reliability. The outcome will be that students will understand the method behind adding and subtracting within 20. The objective is that students will be able to add and subtract by completing the quiz with 85% accuracy.

  • MA.1.AR.1.2 Solve addition and subtraction real-world problems using objects, drawings or equations to represent the problem.
  • MA.1.NSO.2.2 Add two whole numbers with sums from 0 to 20, and subtract using related facts with procedural reliability.
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Video : Adding & Subtracting! | Mini Math Movies | Scratch Garden
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Description: In this short movie, we are introduced to the concept of adding and subtracting within 20. The video shows a visual representation of adding and subtracting.
Quiz : Adding and Subtracting within 20
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1

Madison and Sunny start off with two doughnuts. If Jimmy comes to hang out with Madison and Sunny and brings 4 more doughnuts, how many doughnuts do they have all together as a group?

Question #2
Adding can be defined as taking away an amount from the main whole number. For example, 5-3=2.
Question #3
Subtracting can be defined as taking away an amount from the main whole number. For example, 5-3=2
Question #4

What is 10+5?

Question #5

What is 15-8?

Question #6
Is 17+3=20?
Question #7
is 10-5=6
Question #8
Explain the differences between adding and subtracting.
Question #9

If Ms. Breon came to school with two lunchables and ate one lunchable at lunch, but her friend came and brought Ms. Breon two more lunchabsles. How many lunchables are there?

Question #10

What is 1+0?

Resources : Adding and subtracting from 20
Instructions: Please see additional external resources below. Feel free visit each link to learn more about this lesson.
Adding and Subtracting with Molly
In this game students will work with Molly by applying their knowledge of how to add and subtract.
Subtraction within 20
Students will work with a robot to figure out with visual representations to subtract within 20.
Addition and Subtraction Within 20 | Subtracting to Find the Unknown Added | Kids Academy
In this video, it provides a different strategy when adding and subtracting within the whole number of 20.