Abacus mental arithmetic formula table, learning abacus mental arithmetic is the choice of many people. Abacus mental arithmetic can help children remember theorems and formulas in mathematics more vividly, and the agility of thinking will be greatly improved. The following is about the content sharing of abacus mental arithmetic formula.
Abacus mental arithmetic formula table 1 1, addition formula
One up one, two up two, three up three, four up four, five up five, six up six, seven up seven, eight up eight, nine up nine; Two drops five to three, three drops five to two, and four drops five to one;
One to nine, two to eight, three to seven, four to six, five to five, six to four, seven to three, eight to two, nine to one.
2. Subtraction formula
One, two, two, three, three, four, five, six, seven, seven, eight, nine, nine; One on four to five, two on three to five, three on two to five, four on one to five;
One retreats nine, two retreats eight, three retreats seven, four retreats six, five retreats five, six retreats four, eight retreats two, nine retreats one.
3, except songs.
As soon as I get home, I will be ten when I see one.
Twenty-one equals five, every two equals ten, four equals twenty, six equals thirty and eight equals forty.
Three, one, three, two, six, twelve, ten, six, twenty, nine, thirty every Wednesday.
Four, one, two, four, two add up to five, four, three, seven, twelve, every four into ten, eight into twenty.
Double five times, five into ten.
Six one plus four, six two three twelve, six three plus five, sixty-four, six five eighty-two, every six into ten.
Seven one plus three, seven two plus six, seven three four twelve, seven four five fifteen, seven five seven, seven six eight fourteen, every seven into ten.
Bayi plus two, 82 plus four, 83 plus six, 84 plus five, 8562, 8674, 8786, every eight into ten.
Nine goes with you, and every nine goes into ten.
4, nine return formula
Once (divided by 1): every one goes in, every two goes in, every three goes in, every four goes in, every five goes in, every six goes in, every seven goes in, every eight goes in and every nine goes in.
Two returns (divided by two): every two into one, every four into two, every six into three, every eight into four, 2 1 plus five.
Three returns (divided by three): three into one, six into two, nine into three, three into one, three into two.
Four returns (divided by four): every four into one, every eight into two, four and two phases add up to five, four and one are greater than two, and four and three are greater than two.
Five cycles (divided by five): every five cycles into one, 5 1 cycle is two, 52 cycles is four, 53 cycles is six, and 54 cycles is eight.
Six returns (divided by six): one every six, six three plus five, six one plus four, six two three greater than two, six greater than four and six greater than five.
Seven returns (divided by seven): every seven enters one, seven plus three, seven plus six, seven plus four, seven plus five, seven plus seven plus seven plus eight, seven plus four.
Eight returns (divided by eight): every eight enters one, 84 adds five, 8 1 adds two, 82 adds four, 83 adds six, 856 is greater than two, 867 is greater than four, and 878 is greater than six.
Nine returns (divided by nine): every nine returns to one, nine returns to one, ninety-two returns to two, ninety-three returns to three, ninety-four returns to four, ninety-five returns to five, ninety-six returns to six, ninety-seven returns to seven and ninety-eight returns to eight.
5. Formula of return business
Nothing but retreat, nothing but retreat, and two, nothing but retreat.
No return four, no return five, no return six.
No return 7, no return 8, no return 9.
6, business nine formula
See no score 9 1, see no score 92, see no score 93.
See four division is 94, see five division is 95, and see six division is 96.
Don't divide 97 by seven, 98 by eight, and 99 by nine.
Table 2 1 abacus mental arithmetic formula. Ten plus 1, nine plus 1, ten plus 2, ten plus 3, seven plus 1, ten plus 4, five plus 6, ten plus 65448+0. 10 plus 9, enter 1 and subtract 1.
2. Dial the pearl formula: please dial double nine if you add one, we are all good friends; Add two, please dial double eight, laugh when you are happy; Add three, please dial double seven, sometimes you will be angry; Add four, please dial double six, and jump if you are happy. If you subtract one, please dial double nine and sing like a lark; If you subtract two, please dial double eight, don't delay too much; If you subtract three, please dial double seven and queue up neatly to do exercises; If you subtract four, please dial double six. Don't sleep late in the morning.
3. Pinch formula: add one: enter a pair of nine minus one: return a pair of nine; Add two: enter a pair of eight minus two: return a pair of eight; Add three: enter a pair of seven minus three: return a pair of seven; Add four: enter a pair of six minus four: return a pair of six;
Add five: enter one, add five and subtract five: retreat five; Add six: enter four (4+6) and subtract six: retreat one and go up four (10-6); Add seven: enter the following three (34+7) and subtract seven: retreat one and go up three (101-7); Add eight: enter one and two (234+8) and subtract eight: retreat one and two (101112-8); Add nine: enter the next one (1234+9) and subtract nine: return to the previous one (101213-9).
Table 3 The benefits of children learning abacus mental arithmetic are:
1. Cultivate children's good habit of being active when moving and focusing when quiet.
When the child touches the abacus, the strokes of the beads are calculated and the movements of the beads are changed. Just like playing games, it is fun and attractive, and it can also cultivate a strong interest in learning. Learning abacus is similar to art classes such as music and physical education. In class, teachers are teaching all the time, students are learning all the time, and * * * is in an active position.
So that students are always in a positive thinking state and active position in learning. Abacus mental arithmetic, an educational method suitable for children's characteristics, stimulates children's enthusiasm and initiative in learning. They are cultivating brain function and making children smarter through mobile learning.
Children must be calm, relaxed, focused, clear-headed and quick-thinking, so as to hone their willpower and form a good will quality. Habitually, I have a good habit of active thinking, concentration and concentration on things.
2. Eyes, ears, hands, mouth and brain are involved at the same time.
Effectively cultivate children's attention, observation, memory, imagination and thinking ability.
In abacus mental arithmetic education, listening, watching, reading, manual and lightning counting, turning beads and other actions all conform to the development and movement law of children's hearing and vision, which is not only easy for children to accept, but also effectively cultivates children's attention, observation, memory, imagination and thinking ability.
When students do abacus mental arithmetic, they mainly use image thinking. With the improvement of computing level, image thinking and abstract thinking have been highly integrated, and the conscious transition from image thinking to abstract thinking has been achieved instantly. At the same time, image education promotes the development of right brain, which is creative education. The right brain is mainly engaged in creative thinking activities, which is an important sign that the brain is different from the computer and the basis for the computer to serve the brain.
3. Let children's computing power improve rapidly.
The traditional function of abacus mental arithmetic is to improve the calculation ability. Although primary school mathematics is taught by writing arithmetic, children who have learned "abacus mental arithmetic" always use abacus in their minds. Much faster than children who have never learned abacus mental arithmetic. Usually, when we use calculation in our daily life, we also use abacus, which is much faster than children who have never learned abacus mental arithmetic. When they see the numbers, the corresponding moving beads will automatically appear in their minds, and the results will be calculated quickly.