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Gauss once said: "mathematics is the queen of science, and number theory is the queen of mathematics", people of that era therefore called gauss "the prince of mathematics".
In an interview, Qiu Chengtong, winner of the Fields prize, the highest honor in the world of mathematics, and a scholar of academia sinensis, pointed out that Mathematics should be taught according to aptitude, and both memory and reasoning should be taken into account. It is a kind of "unfortunate" not to recite mathematics of nine-nine multiplication; If you don't use the method of multiplication table you can only have one number and one number and you don't have a complete concept of multiplication.
He said, well, for example,if I have 2 times 10, and I have to add 10 times each time, how can I get to the next level of math? after 40 years of studying mathematics, he still has to learn some things by heart.
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We wish that the children will be familiar with 123 Easy Teaching as same as they are familiar with the "multiplication table". They must be able to be skilled in basic arithmetic after reading 123 Easy Teaching repeatedly. Application on123 Easy Teaching, the children can quickly and intuitively say the answers, no need to use the fingers, 123 Easy Teaching can change the habit of calculation, the child is very intuitive to calculate, became the mental arithmetic.
Reading 123 Easy Teaching, like the effect of reading the "multiplication table", can definitely improve the children's arithmetic ability, and there is significant progress. If the child is proficient, the child can quickly learn basic arithmetic, so that the basic arithmetic can be calculated with the heart. After a short period of proficiency, the child can do operations more quickly and more accurate than the traditional calculation method, and get the answer without using fingers.
Subtraction
Subtraction between two numbers will result in a smaller number. As the subtracted number increases, the final result will become smaller and smaller. If you have to pass through 6 intersections on the way two school and you’ve already gone through two, then you still need to go through 4 more (6 – 2 = 4).
Let’s consider a tree with 8 apples. On the first day, you pick 5 apples, so only 3 apples remain (8 – 5 = 3). The following day you pick 2 more apples, so there is only 1 apple left (3 – 2 = 1). As the number of apples we pick increases, the number of apples remaining on the tree decreases. This is subtraction.
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PART1 of 123 -
2-1＝1
3-1＝2
4-1＝3
5-1＝4
6-1＝5
7-1＝6
8-1＝7
9-1＝8
10-1＝9
11-1＝10
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3-2＝1
4-2＝2
5-2＝3
6-2＝4
7-2＝5
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9-2＝7
10-2＝8
11-2＝9
12-2＝10
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4-3＝1
5-3＝2
6-3＝3
7-3＝4
8-3＝5
9-3＝6
10-3＝7
11-3＝8
12-3＝9
13-3＝10
5-4＝1
6-4＝2
7-4＝3
8-4＝4
9-4＝5
10-4＝6
11-4＝7
12-4＝8
13-4＝9
14-4＝10
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6-5＝1
7-5＝2
8-5＝3
9-5＝4
10-5＝5
11-5＝6
12-5＝7
13-5＝8
14-5＝9
15-5＝10
Notice that the equation is changed interactively when the cursor was moved closely.
Because the fixed graphics JPG files were posted on site, so there is no interactive effect on site.
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7-6＝1
8-6＝2
9-6＝3
10-6＝4
11-6＝5
12-6＝6
13-6＝6
14-6＝8
15-6＝9
16-6＝10
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Notice that the equation is changed interactively when the cursor was moved closely.
Because the fixed graphics JPG files were posted on site, so there is no interactive effect on site.
If you want to experience dynamic teaching effects, please download the interactive pdf file, welcome to download and get the interactive functions. After downloading, experience the new learning method, interactive learning on PC.
Currently, because the (amazon) e-book readers are temporarily unable to get interactive function on the e-book readers.
Please download the following interactive pdf files on the site. Welcome to experience the interactive teaching and share 123 site to more people to increase the fun of learning.
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