Materials for the class
Didactic game template, worksheet, worksheet, and schematics

Layout of the classroom
The desks are arranged in a circle

1^st Phase
Decorate the tree Didactic game

1. Help Eli to decorate the tree.

2. By the correct solution of the tasks, Eli will decorate the Christmas tree so Santa can send a present.

 3. Read correctly three digits. Specify the extraction action components correctly.

 Name the digits positions in the three-digit number records correctly.

 2^nd Phase
Questions:

 1.How is Equal 1000 – 216

How do we record?

  1000 –    216  =    784

Let’s check:

 784 +216 = 1000

2. How does the result change when the dimmer grows?

1000 – 63 = 937

1000 – 193 = 807

 1000 – 323 = 677
-When the dimmer grows, the difference decreases.
3.Elу shows the number 281.

 Which number should Petar make, so that their sum is 1000?

 281+ ? = 1000

 We will find out from the sum up the famous collectible:

1000-281 = 719

 Imagine the number found as a sum of hundreds, ten and units 7 hundred + 1 tenth +9 units

4. Before the Christmas holidays, 1000 trees were sold in three days.

 On the first day, they are 350 and are 50 more than those sold on the second day.

How many trees are sold on the third day?

 With 50 more
– It is clear that the second day sold 50 fir * trees less:

 350 – 50 = 300 Christmas trees a second day.

 – The third day we will find out when out of the total number of fir trees we extract the sum of the Christmas trees sold on the first and second day:

1000 – (350 + 300)

 = 1000-650

 = 350
Well done ! Ely decorated the tree well.

3^rd Phase

The teacher explains to the students how to subtract a three digit number of 1000 by passing, representing the number 1000 as the sum of hundreds, tenths and units in the following way:

 9 hundreds, 9 tenths. And 10 units.

 Specifies a student to answer and solve the task.

1000 – 216 =?

 By presenting the numbers as sums of hundreds is ten and units: Solution:

1000 = 9 hundred + 9 tenths + 10 units

– 216 = 2 hundred + 1 tenth + 6 units      7 hundred +8 tenths + 4 units

 The teacher explains the subtraction action components through the given task:

 1000 – 356 = 644

The number 1000 is called minuscule

The number 356 denominator

The 644 difference

Specifies a student to solve a similar task and to name the components in an extraction action;

1000 – 281 =?

4^th Phase

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

“The Fir-Tree” (Danish: Grantræet) is a literary fairy tale by the Danish poet and author Hans Christian Andersen (1805–1875). The tale is about a fir tree so anxious to grow up, so anxious for greater things, that he cannot appreciate living in the moment.