Find an unknown multiplier

3rd grade.MATHEMATICS: (Bulgarian educational system)
Based on the lesson “Finding an unknown multiplier”
3 greade page 116 “Mathematics” publishing Bulvest

maths

Materials for the lesson

Didactic game template, worksheet, worksheet, and schematics

Layout of the classroom
The classrooms are arranged in a circle

Phase 1

Directions for the game:

 “”The bear and the honey”

 Didactic game Directions:

 Help Mechoke find the branch in which the bees have hidden the honey.

Ø  Outline his path with rays. Start from the quadrangle.

Pass as many rectangles as the value of the unknown multiplier in the tasks.

Ø  Follow the sequence of tasks.

Ø  Be careful in the directions.

up

 Phase 2

Questions:

 1. Roll up. Make as many rectangles as the value of the unknown multiplier in the work:

 7. x = 35

 2. Turn right. Pass as many rectangles as the value of the unknown multiplier in the work:

 6. x = 18

3. Go down. Make as many rectangles as the value of the unknown multiplier in the work:

4. x = 28

 4. Turn left. Move as many rectangles as the value of the unknown multiplier in the work:

 x  . 6 = 54

5. Go upward. Make as many rectangles as the value of the unknown multiplier in the work:

x. 8 = 40

 6. Turn right. Pass as many rectangles as the value of the unknown multiplier in the work:

   x  . 4 = 16

 7. Go down. Make as many rectangles as the value of the unknown multiplier in the work:

   x . 7 = 42

8. Turn right. Pass as many rectangles as the value of the unknown multiplier in the work:

18 =x. 2

9. Go upward. Make as many rectangles as the value of the unknown multiplier in the work:

 56 = x. 8

10. And now where? How many in nine is seventy-two years …?

The lesson from the game is: “Foreign labor does not steal! Respect hardworking bees!

Phase 3

 The teacher explains to students how an unknown multiplier is located. -Unknown multiplier is when the work divides the famous multiplier.

Example 6 . x = 42

42/6=?

And points to one student to answer and solve the task.

Specifies a student to answer and solve the task.

Solution:

42/6 = 7

Checking:

6 x 7 = 42

Phase 4
Students  help the teacher return the classroom back to its normal appearance.