Solving examples up to 20 simulator. Mathematical corner in the country

Preparing for the game - settings

1. Any parameters and settings can be changed at any time, even during the game.
2. Initially the game is set up like this:
   • Calculation type - Add up to 10
   • Award 1- chocolate, premium 2- cookies
   • In game session 10 calculations (arithmetic examples)
   • Percentage of examples that need to be solved correctly to receive Prize 1 - 90%
   • Percentage of examples that need to be solved correctly to receive Prize 2 - 70%
3. You can choose any other type of calculation - depending on what the child knows and what is happening at school at the moment. Types of calculations in the game:
   • Addition, subtraction, addition and subtraction (mixed):
     • To 10
     • up to 20 (with the transition through the ten)
     • Up to 20 (with and without the transition through the ten)
     • up to 30
     • Up to 100
   • Multiplication, division or any combination -by 1, -by 2, -by 3.......etc. up to 10
   • Number Comparison
4. Set how many examples will be in the game session. It is better to start with a small number of attempts - 5 or 10, so as not to discourage the child from continuing the game. When the child increases milk production :) improves performance, you can move on to a serious game with 100-200 examples.
5. Enter the percentage of correctly solved examples for which 1 and 2 awards are given. For starters, it is better to lower the percentage. For example, choose 70 and 50 percent for premiums 1 and 2, respectively. Later, the rates can be increased to 90 - 70. Or even up to 98% - 95% for absolutely terribly smart children :). Enter only numbers, without the % sign!
6. Write down the prizes that the child will receive for 1st and 2nd place.
7. The settings will be saved using a cookie (small script) and restored the next time you open the game page in your browser.

Now you can start the game!

1. To start the game, press the START button
2. When an example appears on the screen, the child must enter the answer after the "=" sign
3. If we play "comparisons", you need to enter the appropriate sign: . To do this, it is most convenient to use the buttons that will appear next to the NEXT button.
4. After the result is entered, you need to press the OK button (or ENTER on the keyboard) to check if the example was solved correctly.
5. If the example was solved correctly, "Correct" will appear on the screen. If not, "Incorrect" and the correct answer. At the same time, the game will calculate the percentage of correctly solved examples
6. To go to the next example, you need to click the NEXT button
7. When the session ends, the screen will display the prize that the child won (or "won nothing") and the percentage of examples correctly solved for the session
8. To start a new session, click the START OVER button.

Great expectations:)

What can you expect from this game? Great help in passing the school curriculum! As a rule, in 5-7 days, in which the child plays for 30-40 minutes, he firmly masters the next type of calculation (for example, addition to 20 with a transition through the ten). And practically ceases to make mistakes in the classroom.

The very first examples that a child gets acquainted with before school are addition and subtraction. It is not so difficult to count the animals in the picture and, crossing out the extra ones, count the rest. Or shift the counting sticks, and then count them. But for a child it is somewhat more difficult to operate with bare numbers. That is why it takes practice and more practice. Do not stop studying with your child in the summer, because over the summer the school curriculum simply disappears from a small head and it takes a long time to catch up on lost knowledge.

If your child is a first-grader or just going to first grade, start by repeating the composition of the number in the houses. And now we can take examples. In fact, addition and subtraction within ten is the first practical application by a child of knowing the composition of a number.

Click on the pictures and open the simulator at maximum magnification, then you can download the image to your computer and print it in good quality.

It is possible to cut A4 in half and get 2 sheets of tasks if you want to reduce the load on the child, or let them solve one column a day if you decide to work out in the summer.

We solve the column, celebrate successes: cloud - not very well solved, smiley - good, sun - wonderful!

Addition and subtraction within 10

And now scatter!

And with gaps (windows):

Examples for addition and subtraction within 20

By the time the child begins to study this topic of mathematics, he should know very well, by heart, the composition of the numbers of the first ten. If the child has not mastered the composition of numbers, it will be difficult for him in further calculations. Therefore, constantly return to the topic of the composition of numbers within 10 until the first grader masters it to automatism. Also, a first grader should know what the decimal (bit) composition of numbers means. In math class, the teacher says that 10 is, in other words, 1 ten, so the number 12 consists of 1 ten and 2 units. In addition, units are added to units. It is on the knowledge of the decimal composition of numbers that the methods of addition and subtraction within 20 are based. without going through ten.

Examples for printing without jumping through a dozen mixed:

Addition and subtraction within 20 moving through ten are based on the methods of adding up to 10 or subtracting to 10, respectively, that is, on the topic "composition of the number 10", so take a responsible approach to studying this topic with your child.

Examples with a transition through a dozen (half of the sheet is addition, half is subtraction, the sheet can also be printed in A4 format and cut in half into 2 tasks):

In this lesson, you will learn how to add and subtract single-digit numbers with a jump through the digit. Solving interesting tasks, you will learn the algorithm for adding and subtracting numbers with the transition through a dozen and get acquainted with the addition table of single-digit numbers up to 20. You will have the opportunity to practice the previously studied material on interesting examples.

Topic:Introduction to basic concepts in mathematics

Lesson: Addition and subtraction of single-digit numbers with the transition through the discharge. Addition table up to 20

The graphical model can be used to explain addition of single-digit numbers with the transition through a dozen.

How can you add 9 and 7 together?(Fig. 1)

Rice. one

The graphical model shows that the first term 9 must be supplemented to 10. To do this, we divide the second term into two parts, one of which is equal to the number 1, since

9 + 1 = 10, so 7 = 1 + 6. (Fig. 2)

Rice. 2

Let's do the addition by parts:

9 + 7 = (9 + 1) + 6 = 10 + 6 = 16

Answer: 9 + 7 = 16.

You can add these numbers in a different way. (Fig. 3)

Rice. 3

The second term 7 can be supplemented to 10. To do this, we divide the first term into two parts, one of which is equal to the number 3. Therefore, 9 = 3 + 6.

Rice. 4

Let's do the addition by parts:

7 + 9 = (7 + 3) + 6 = 10 + 6 = 16

The first term is 9, it lacks up to 10 one unit, so we break the second term into parts. 5 is 1 and 4. We add to 9 first one unit, and then the remaining four units.

9 + 5 = 9 + (1 + 4) = 14

The first term is 6, it lacks up to 10 four units, so we divide the second term into parts: 4 and 2. We add 4 to 6 first and get ten units, and then the remaining two units.

6 + 6 = 6 + (4 + 2) = 12

The first term is 4, it lacks up to 10 six, so the second term 8 is divided into parts: 6 and 2. We add six units to 4 first and get ten units, and then the remaining two units.

4 + 8 = 4 + (6 + 2) = 12

In the reduced 15, there are five units, so we divide the subtracted 7 into parts: 5 and 2. We first subtract five units from 15, we get 10. Then we subtract the remaining two units from ten.

15 - 7 = 15 - (5 + 2) = 8

In the reduced 16, there are six units, so we divide the subtracted 9 into parts: 6 and 3. First subtract six units from 16, we get 10. And then subtract the remaining three units from 10.

16 - 9 = 16 - (6 + 3) = 7

In the reduced 12, there are two units, so we divide the subtracted 4 into parts: 2 and 2. Subtract 2 from 12, we get 10. And subtract 2 from 10.

12 - 4 = 12 - (2 + 2) = 8

Answer: 12 - 4 = 8.

It is not always convenient to use the method of addition and subtraction in parts with the transition through a dozen, so you need to learn single digit addition table up to 20 by heart.

The figure shows a table with which it will be easier for you to learn the cases of adding single-digit numbers up to 20. (Fig. 7)

Rice. 7

In each column, the first term is the same, and the second is increased by one, which means that the sum will also increase by one. Find the value of these sums.

9 + 2 \u003d 11, therefore: 9 + 3 \u003d 12, arguing like this, we fill out the entire table. (Fig. 8)

Rice. eight

Each line contains sums with the same answers. Choose the way it will be easier for you to remember the answers: in columns or in rows. If you learn well the table of adding single-digit numbers up to 20, then it will not be difficult for you to perform subtraction of single-digit numbers within 20.

Bibliography

1. Aleksandrova L.A., Mordkovich A.G. Mathematics 1st grade. - M: Mnemosyne, 2012.
2. Bashmakov M.I., Nefedova M.G. Mathematics. 1 class. - M: Astrel, 2012.
3. Bedenko M.V. Mathematics. 1 class. - M7: Russian word, 2012.

1. Social network of educators ().
2. 5class.net().
3. self-taught ().

Homework

1. Remember how to correctly add and subtract single-digit numbers with a transition through the discharge.

2. Help the frog solve the examples.

3. Solve the examples and color the drawing.

Addition and subtraction tables are used to teach children to count or to test their skills in addition and subtraction. These two tasks use different tables. Both versions of the tables can be downloaded and printed on this page

Addition table up to 20 print and download

The addition table is used to teach children. The vertical leftmost column and the horizontal top row are summands. In order to add two numbers, you need to find them in a vertical column and in a horizontal row. The intersection forms the sum of these two terms. For example, as shown in the figure below, 6 + 5 = 11.

You can print the addition table up to 20 in Word or PDF format. If you need an addition table up to 10, it can be easily done by deleting unnecessary cells in the Word format. If you need an addition table more than up to 20, then you can download the addition table in Excel format and add the necessary columns and rows by copying.

Subtraction table up to 20 print and download

The subtraction table uses the same addition table that can be printed above. Suppose we need to solve the example 14 - 8 = 6. Using the subtraction table, we find in the table field a diagonal with a decreasing 14. In the figure below, this diagonal is highlighted in light green. We select the number 14 on this diagonal, which is opposite the subtracted 8. The resulting number 6 in the top row is the answer.

As you can see, the same addition and subtraction table is used for addition and subtraction, which you can print or download from the links above in different formats.

Subtraction table without answers print and download

I already wrote about ours. But we seem to be growing out of it. In any case, Dima can freely count from 1 to 100 and vice versa. I understand that his need for mathematical knowledge is growing along with him. So I decided to delve into the study of mathematics according to the Zaitsev system.

The table of a hundred has long been familiar to me, even my older children had this. But Zaitsev has so many more interesting developments. Only one BUT for most of them you need a lot of space. And it is sorely lacking in our apartments.

At the dacha, we finally made ourselves a room. And, lo and behold, we have a large and not yet occupied wall! I immediately decided that I would hang on it. I bring to your attention our mathematical corner in the country:

Addition and subtraction table within 20.

Numerical tape from 0 to 100.

True, according to the method, it should hang in one line, but we certainly don’t have such a long wall! My tables are slightly different from Zaitsevsky, but their essence is the same. In the number ribbon, I wanted to play with colors a little. And making a colored background behind the numbers - for me, for example, is not very economical when printing. In my opinion, it is enough that the numbers themselves are colored. And I added the number of basic numbers to the table of addition and subtraction within 20 - it seems clearer to me.

Tasks for the tables can be read on Zaitsev's website, where you can order original manuals. I offer what I made for my son. The documents will be in PDF format and need to be printed on thick paper.

Addition and subtraction table within up to 20 on 5 sheets, in which you need to cut the margins and glue the sheets together. I used regular tape and glued it on the back side.

Number tape on 22 sheets. The first two dozen fit on one sheet. They only need to be cut lengthwise and glued between 4 and 5, 14 and 15. From 20 to 59, everything is also clear. But the next dozens did not fit on one sheet in width, so you have to work a little and figure it out when gluing. I hope you manage.

Dima was very impressed with the new tables! He immediately noticed that on one table the numbers are black and orange, and on the other they are green. He really liked to travel through the number tape in search of the numbers that I call.