Solving the division table of 2

Students learn to solve the division table of 2.

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The students learn to solve the division table of 2.

CCSS.Math.Content.3.OA.B.5/6

Students will be able to solve the division table of 2.

You practice taking jumps of 2 to 20 with the students. You do this forwards and backwards.

First you discuss the importance of calculating division problems. Next you explain that with a division problem you have a number of something in each group and that with the division table of 2 you always divide the number by 2. For this you show an example of a pizza in 8 pieces, that you are going to divide evenly between 2 people. From here you use the bar on the bottom right to navigate through the lesson (visual, abstract, story) to discuss the learning goal in the order that you need. Otherwise you just continue through the pages in order and start with the problems with visual support. For this you explain how you solve a division problem by telling how a division problem words with images of fish in a bowl, next you practice by dividing a number of chickens between two cages. After this you show images and the students must come up with a problem to match each image. Next you show an image and ask a student volunteer to divide the lions between 2 savannahs and a number of marbles between two containers. After this you have the students solve division problems on their own using an image. Then you discuss the abstract problems. First you show what a division problem looks like when you divide a number evenly by 2. After this you show the division problems where numbers are divided by 2. For this you discuss that with dividing by 2, the answer is always half of the number that you started with. Next the students use this insight when practicing more division problems with 2. Then you follow the steps of solving s story problem. The students can click on the speaker to hear the story.

Check whether the students can calculate with the division table of 2 by asking them the following questions:

- What does the problem 6 ÷ 2 mean? Can you name an example?

- Can you flip the numbers in a division problem?

The students test their understanding of dividing by 2 through ten exercises on dividing by 2. For some of the exercises there is visual support, others are just the abstract problems and other exercises are story problems.

You have the students solve another problem with visual support; after that they solve another abstract problem and next they solve another story problem. Finally you can also play a ball game. You throw the ball to a student and say a division problem. The student that catches the ball says the answer and throws the ball back.

You can have the students practice with concrete materials by splitting different numbers into 2 groups.

MAB blocks for each pair of students, or other concrete materials

A ball

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Lesson

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