Solving the division table of 9

Students learn to solve the division table of 9.

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The students learn to solve the division table of 9.

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

Students will be able to solve the division table of 9.

You ask student volunteers to come up to the whiteboard and take jumps of 9 with the monkey. You do this forwards and backwards. After this you ask the students to draw a pizza and divide this into 9 even pieces. Next have the students ask a friend which piece of pizza they would choose and why.

First you discuss the importance of solving division problems. Next you explain that with a division problem you have a certain amount of something in each group and that in the division table of 9 you are going to divide by 9 each time. For this you show an example of 18 pieces of pizza, that you are going to divide evenly into 9 slices. From here you can use the bar on the bottom right to navigate through the lesson (visual, abstract, story) in a way that best suits your learning goals. Otherwise you continue following the pages of the lesson in order and move on to problems with visual support. Here you explain how you calculate a division problem by telling how a division problem words with images of chewing gum that must be divided between 9 mouths, then you practice dividing a number of candles between 9 cakes. After this you show the images and the students must come up with the problem that matches each one. Next you have the students solve division problems on their own with help from an image. After this you discuss the abstract problems. First you show what division by 9 looks like when you divide the number 9 evenly. After this you show the problems from the division table of 9 and show that you can use the division table of 9 to solve them. Next the students practice using what they have learned. Then you walk the students through the steps of solving a story problem. The students can click on the speaker to hear the story.

Check whether the students can solve problems from the division table of 9 by asking them the following questions:

- What does the problem 18 ÷ 9 mean? Can you name an example?

- What can be a memory aid when solving the division table of 9?

The students test their understanding of the division table of 9 through ten exercises. For some of the exercises there is visual support, others are abstract division problems and other exercises are story problems about the division table of 9.

You have the students solve one more problem with visual support, then another abstract problem and then they answer another story problem. To close you can play a ball game. A student names a problem from the division table of 9 and throws the ball to another student. The person who caught the ball must answer the problem, name another problem from the division table of 9, and then pass the ball along to a different student.

You can have the students use concrete materials to help them solve division problems, by dividing them up into 9 groups.

MAB blocks or other concrete materials for each pair.

A ball.

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