Addition table cards within 20 print. Mathematical corner in the country. Preparing for the game - settings
In this lesson, you will learn how to add and subtract single-digit numbers with a jump through the digit. Deciding 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. four
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 subtract five units from 15 first, 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
- Aleksandrova L.A., Mordkovich A.G. Mathematics 1st grade. - M: Mnemosyne, 2012.
- Bashmakov M.I., Nefedova M.G. Maths. 1 class. - M: Astrel, 2012.
- Bedenko M.V. Maths. 1 class. - M7: Russian word, 2012.
- Social network of educators ().
- 5class.net().
- 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.
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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
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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.
Counting within the first two tens with the transition through the category is a very difficult topic for first-graders.
And not only for them. Not everyone can easily and quickly add and subtract numbers with the transition through the ten.
Therefore, I propose to download this notebook, or rather, a set of sheets with tasks.
Examples have already been written here, solutions must be entered in the boxes. Therefore, the child is easier from the fact that he does not have to rewrite these examples on his own.
Download: (downloads: 1550)
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Good afternoon, dear readers! How much effort adults have to make to teach a child to count within 10 and 20. And not only count, but also solve examples, subtract and add! At the same time, this is not as difficult as it seems at first glance. We offer you non-standard game methods on how to teach a child to count examples within 20.
Where to begin?
Stage 2
If you have learned to count, get acquainted with the graphic representation of numbers. For this purpose, we use cubes with numerical images, cards.
Stage 3
The next step is very important: it prepares the basis for quick mental counting. This is the study of the composition of numbers. If the baby is firmly aware of how the numbers are laid out, he will easily solve examples for addition and subtraction.
The study of the composition of the number is traditionally carried out using the so-called "houses". Draw a house on a piece of paper. On one "floor" there are always 2 cell rooms. The number of storeys of the house is determined depending on the number of numerical pairs into which the figure can be decomposed.
For example, 4 can be decomposed into 3 and 1, 2 and 2. So the number 4 lives in a two-story house, and so on. We will write it on the roof. The example clearly shows how to correctly compose houses for the numbers 3, 4 and 5.
The resettlement of "tenants" on the floors of the child will have to memorize. Start with small numbers. Ask the baby to carefully look at who lives with which neighbor, and then “populate” the numbers on their own.
When the two and three are mastered, move on to more complex numbers. This technique gives the most solid results. Proven in my own experience.
Here you can download such a table and use it to master the technique of number composition: 
Stage 4
When the houses were completed, it was the turn of examples within 10. In the first grade, these examples will have to be solved in the first half, so it's better to prepare in advance. Now it remains only to put + or - signs between the “settlers”, having previously explained their purpose to the baby.
First, present addition or subtraction in the form of a game. For example, one left the floor from the four. Which of the neighbors will stay on the floor? Answer: three. Such exercises will help the baby quickly get used to mathematical examples. Gradually, the words “left”, “came” are changed to “plus” and “minus”.
So we mastered the count with the child within 10. As you can see, the technique is very simple, but it takes time and patience to work. Try to force the baby to first count in the mind: written exercises slow down thinking.
Along the way, train the concepts of “more-less” (first use the objects, spreading them on different sides, then compare the numbers), neighbors of the number (write a series of numbers with missing numbers and ask the baby to complete the series by correctly placing the neighbors).
Move on…
It's time to introduce the baby to the second ten. To overcome arithmetic difficulties, we propose the following lesson algorithm:
Part 1
We introduce the concept of ten. To do this, lay out 10 cubes in front of the child and add one more. We explain that it is eleven. We are talking about the fact that the end of the word "twenty" means "ten". To form a number from 11 to 19, you just need to add a number to the ending "twenty" and put the preposition "on" between them.
Part 2
Since the baby is already familiar with the concept of ten, we introduce the category of units and, when adding, we operate with these concepts. For example, 13+5. We add the units first: 3+5=8. Now add the remaining ten and get 18. 
Part 3
Now let's move on to the negative examples: we act in the same way. Subtract ones, then add ten.
Part 4
The most difficult stage is subtraction, in which the first unit is less than the second: 13-6. In this example, we cannot subtract six from 3. You have to deal with ten. One of the ways is to subtract three from six, subtract the remaining number from ten, i.e. 6-3=3, 10-3=7. After a few workouts, the kid will be able to subtract in his mind.
The child must clearly master the skills described: in grade 2, he will need this to solve examples with two-digit numbers.
To brighten up the learning process, you can attract various aids:
- cubes;
- magnets;
- pictures (training with pictures is especially diverse: you can simply count them, use coloring pages with examples to consolidate counting skills);
- any items at hand;
- counting sticks;
- abacus, etc.
The more you show imagination, the sooner you will interest the child in mathematics.
We have examined the sequence of teaching crumbs to solve examples within 20 in stages. If the article was useful to you, leave a comment or share the article with your friends on social networks. networks.
See you soon, dear friends!
