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Anonymous users2024-02-06Preparation: Parents need to give a verbal order to "clear" before reading the following verbal decisions and doing relevant finger games, and the children will immediately clap their hands with high-fives, and then clench their fists in front of their chests to concentrate on preparation. (Note:.)
The palms of the hands are facing inward, and the two fists are spaced apart to facilitate the fingers of both hands, neither too close nor too far. ）
1. Finger positioning and oral decision I have a pair of hands, representing ninety-nine, the left hand sets the ten, the ninety I will count, the right hand sets the one, from one to nine: addition and subtraction is very convenient, and the calculation does not have to worry.
Second, the hand designates several mouths to decide the index finger to extend "1" and the middle finger to extend the "2" ring finger.
Stretch out for "3" pinky finger stretch out "4" Hold the thumb with four fingers, the thumb is "5" to remember, and then stretch the index finger to the little finger to line up the number.
Three, the right hand out of the fingers to practice oral duel one horse in the lead, two tigers compete, three words and two words, the four seas for the home, the five grains are abundant, the six animals are prosperous, seven up and eight down, eight immortals across the sea, nine cows and one hair, 100,000 for the urgency. One word and nine tripods, two dragons play with pearls, three-legged tripods, embattled, abundant grains, six gods without owners, seven up and eight down, eight sides exquisite, nine cows and one hair, perfect. (Note:.)
When reading "100,000 urgent" or "perfect", the right hand is clenched into a fist, and the left hand is "1", which represents carrying.
4. Practice oral duels with the fingers of the left hand 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. (Note: When you say "one hundred", clasp your hands high-five, then clench your fists in front of your chest.) ）
Don't know what it does?
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Anonymous users2024-02-051 and 4, 5, 4 and 1, 5, 1+4=5, 4+1=5
1 plus 4, five doctors, 4 plus 1, five doctors, 5-1=4, 5-4=1;
2 and 3, composed of 5, 3 and 2, composed of 5, 2+3=5, 3+2=5, 2 plus 3, Wuzhishan, 3 plus 2, Wuzhishan, 5-2=3, 5-3=2;
3 and 3, composed of 6, 3+3=6, 3 plus 3, six immortals, 6-3=3
2 and 4, make up 6, 4 and 2, make up 6, 2 + 4 = 6, 4 + 2 = 6 2 plus 4, six monkeys, 4 plus 2, six monkeys, 6-2 = 4, 6-4 = 2
3 and 4, make up 7, 4 and 3, make up 7, 3+4=7 4+3=7 3 plus 4, 7 peaches, 4 plus 3, 7 peaches, 7-3=4 7-4=3
4 and 4 make up 8, 4+4=8, 4 plus 4, 8 brothers, 8-4=4
Addition and subtraction formulas within 100.
1 and 9, make up 10, 9 and 1, make up 10, 9+1=10, 1+9=10, 10-1=9 10-9=1, 1 and 9, hand in hand, 1 has difficulty finding 9, 9 has difficulty finding 1, adding 1 is subtracting 9, adding 9 is subtracting 1, don't forget to carry 10 with the left hand; 1 and 9, hand in hand, minus 1 is to add 9, minus 9 is to add 1, don't forget to borrow 10 in the left hand.
2 and 8, composition 10, 8 and 2, composition 10, 2+8=10, 8+2=10, 10-2=8 10-8=2
2 and 8 are a family, plus 2 is to subtract 8, plus 8 is to subtract 2, don't forget to carry 10 on the left hand, 2 and 8 are a family, minus 8 is to add 2, minus 2 is to add 8, don't forget to borrow 10 on the left hand
3 and 7, make up 10, 7 and 3, make up 10, 3+7=10, 7+3=10, 10-3=7 10-7=3
3 and 7, fly the plane, add 3 is to subtract 7, add 7 is to subtract 3, don't forget to carry 10 on the left hand; 3 and 7, flying, minus 3 is to add 7, minus 7 is to add 3, don't forget to borrow 10 in the left hand.
4 and 6, composition 10, 6 and 4, composition 10, 4+6=10 6+4=10 10-4=6 10-6=4
4 and 6, good friends, add 4 is to subtract 6, add 6 is to subtract 4, don't forget to carry 10 on the left hand, 4 and 6, good friends, minus 4 is to add 6, minus 6 is to add 4, don't forget to borrow ten on the left hand.
5 and 5, make up 10, 5+5=10 10-5=5
5 and 5, big tiger, add 5 is to subtract 5, don't forget to carry 10 with the left hand, 5 and 5, big tiger, minus 5 is to add 5, don't forget to borrow 10 with the left hand
Addition is carrying, and subtraction is borrowing.
The condition of using the formula: when the two numbers add up to more than 9, it is considered that it is not enough to add, when the subtracted number is less than the subtraction, it is not enough to subtract, then it is necessary to use the advance and retreat plus and minus formula.
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Anonymous users2024-02-04Finger positioning formulaI have a pair of hands, representing ninety-nine.
Ten on the left hand, ninety I will count.
Set a position on your right hand and count from one to nine.
Addition and subtraction are very convenient, and you don't have to worry about calculation.
Specify the number of mantras by handThe index finger extends the "L" and the middle finger extends the "2".
The ring finger is a "3" and the little finger is extended to "4".
Hold your thumb with four fingers, and remember that your thumb is "5".
Extend your index finger to your little finger again, and "6", "7", "8", and "9" are numbered.
Right hand finger practice mantra:One horse takes the lead, two tigers compete, three words and two words, the four seas are home, and the five grains are abundant.
Six animals are prosperous, seven up and eight down, eight immortals cross the sea, nine cows and one dime, and one hundred thousand are urgent.
One word and nine tripods, two dragons play with pearls, three-legged tripods, embattled, and abundant grains.
Six gods have no master, seven up and eight down, eight sides are exquisite, nine cows and one hair, and they are perfect.
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Anonymous users2024-02-03The hand-brain quick calculation formula is as follows: Lu Kai
First, the addition of non-carrying.
Plus 4,5 dr. （1+4=5 4+1=5）
Add 3, 5 finger mountains. （2+3=5 3+2=5）
Plus 4, 6 monkeys. （2+4=6 4+2=6）
Plus 3, 6 immortals. (3+3=6).
Add 4, 7 peaches. （3+4=7 4+3=7）
Plus 4,8 brothers. （4+4=8）
Plus 5, big tiger. （5+5=10）
Second, carry addition (right minus left, right hand minus a few, left hand remember to carry 1).
and 9, hand in hand. 9 have difficulty finding 1. (minus 1 into 1) 1 has difficulty finding 9. (minus 9 into 1).
and 8, is one. 8 have difficulty finding 2. (minus 2 into 1) 2 has difficulty finding 8. (minus 8 into 1).
And 7, pro brothers. 7 have difficulty finding 3. (minus 3 into 1) 3 has difficulty finding 7. (minus 7 into 1).
And 6, good friends. 6 have difficulty finding 4. (minus 4 into 1) 4 has difficulty finding 6. (minus 6 into 1).
and 5, the Big Tiger. 5 has difficulty finding 5. (minus 5 into 1).
3. Abdication and subtraction (left plus right retreat, right hand plus a few, left hand remember to abdicate 1. ）
and 9, hand in hand. 9 have difficulty finding 1. (plus 1 back 1) 1 has difficulty finding 9. (Plus 9 back 1).
and 8, is one. 8 have difficulty finding 2. (plus 2 back 1) 2 has difficulty finding 8. (Plus 8 back 1).
And 7, pro brothers. 7. I have trouble finding it. (plus 3 back 1) 3 has difficulty finding 7. (plus 7 back 1).
And 6, good friends. 6 have difficulty finding 4. (plus 4 back 1) 4 has difficulty finding 6. (plus 6 back 1).
and 5, the Big Tiger. 5 has difficulty finding 5. (Plus 5 back 1).
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Anonymous users2024-02-021. Finger positioning formulaI have a pair of hands, representing ninety-nine. Ten on the left hand, ninety I will count. Set a position on your right hand and count from one to nine. Addition and subtraction are very convenient, and you don't have to worry about calculation.
2. Specify the number of formulas by hand.
The index finger extends the "L" and the middle finger extends the "2". The ring finger is a "3" and the little finger is extended to "4".
Hold your thumb with four fingers, and remember that your thumb is "5". Extend your index finger to your little finger again, and "6", "7", "8", and "9" are numbered.
3. Practice the mantra with the fingers of the right hand.
One horse takes the lead, two tigers compete, three words and two words, the four seas are home, and the five grains are abundant.
Six animals are prosperous, seven up and eight down, eight immortals cross the sea, nine cows and one dime, and one hundred thousand are urgent.
One word and nine tripods, two dragons play with pearls, three-legged tripods, embattled, and abundant grains.
Six gods have no master, seven up and eight down, eight sides are exquisite, nine cows and one hair, and they are perfect.
Note: When reading "100,000 urgent" or "perfect", the right hand is clenched into a fist, and the left hand is "1", which represents the carry position.
4. Practice the mantra with the fingers of the left hand.
ten, twenty, thirty, forty; Fifty, sixty, seventy, eighty, ninety, one hundred.
(Note: When you say "one hundred", clasp your hands high-five, then clench your fists in front of your chest.)
5. Count with both hands.
Note: According to the cognitive level of children of each age, choose the size of the number.
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Anonymous users2024-02-01The formulas for children's oral arithmetic, mental arithmetic, and quick arithmetic are as follows:1. Mental arithmetic addition formula table:
One on the potato button. One, two.
Two, three. Three, four.
Fourth, the number is round and five up.
Five, six. Six, seven.
Seven, eight. Eight, nine on nine; Two down and five go.
Three, three, five go.
Two, four down five to one;
One goes nine in. One, two go and eight in.
One, three to seven in.
One, four to six in.
One, five to five in.
One, six to **.
One, seven go three in.
One, eight to two in.
One, nine go and one into one.
2. Abacus mental arithmetic subtraction formula table:
One time. One, two.
Two, three down. Three, four times.
Four, five times. Five, six.
Six, seven. Seven, eight.
Eight, nine under nine; One up and four up.
Five, two up and three go.
Five, three up and two go.
Five, four, one to five; One return and one return.
Nine, two return and one return.
Eighth, three retreats and one return.
Seventh, four retreats and one return.
Sixth, five return and one return.
Five, six return and one return.
Fourth, eight retreats and one return.
Second, nine back one back one.
3. Mental arithmetic division nine-return formula:
Every one into one, every two into two, every three into three, every ** four, every five into five, every six into six, every seven into seven, every eight into eight, every nine into nine.
4. Mental arithmetic division withdrawal formula:
No removal and return one, no removal and return one, no removal and one return and two, no removal and one cavity posture and three, no removal and retreat and four, no removal and return five, no removal and return six, no removal and return seven, no removal and return eight, no removal and nine returns.
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Anonymous users2024-01-31The hand-brain quick calculation formula is as follows:
First, the addition of non-carrying.
Plus 4,5 dr. （1+4=54+1=5）
Add 3, 5 finger mountains. （2+3=53+2=5）
Plus 4, 6 monkeys. （2+4=64+2=6）
Plus 3, 6 immortals. （3+3=6）
Add 4, 7 peaches. （3+4=74+3=7）
Plus 4,8 brothers. （4+4=8）
Plus 5, big tiger. （5+5=10）
Second, carry addition (right minus left, right hand minus a few, left hand remember to carry 1).
and 9, hand in hand. 9 have difficulty finding 1. (minus 1 into 1) 1 has difficulty finding 9. (minus 9 into 1).
and 8, is one. 8 have difficulty finding 2. (minus 2 into 1) 2 has difficulty finding 8. (minus 8 into 1).
And 7, pro brothers. 7 have difficulty finding 3. (minus 3 into 1) 3 has difficulty finding 7. (minus 7 into 1).
And 6, good friends. 6 have difficulty finding 4. (minus 4 into 1) 4 has difficulty finding 6. (minus 6 into 1).
and 5, the Big Tiger. 5 has difficulty finding 5. (minus 5 into 1).
3. Abdication and subtraction (left plus right retreat, right hand plus few, left hand remember to abdicate 1. ）
and 9, hand in hand. 9 have difficulty finding 1. (plus 1 back 1) 1 has difficulty finding 9. (Plus 9 back 1).
and 8, is one. 8 have difficulty finding 2. (plus 2 back 1) 2 has difficulty finding 8. (Plus 8 back 1).
And 7, pro brothers. Lu Kai 7 had difficulty finding it. (plus 3 back 1) 3 has difficulty finding 7. (plus 7 back 1).
And 6, good friends. 6 has difficulty going to the early slide to find 4. (plus 4 back 1) 4 has difficulty finding 6. (plus 6 back 1).
and 5, the Big Tiger. 5 has difficulty finding 5. (Plus 5 back 1).
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Anonymous users2024-01-30Formula: 1 is not enough, 9 is made up for double
Subtracting 1 from the bottom is not enough, and making up 9 for the double
It is not enough to add 2 under the bottom, and 8 to make up for the double down
The lower minus 2 is not enough, and the double upper makes up for 8
It is not enough to add 3 under the bottom, and 7 under the double down
The lower minus 3 is not enough, and the double upper makes up for 7
It is not enough to add 4 under the bottom, and 6 under the double down
The lower subtraction of 4 is not enough, and the double upper makes up for 6
"Fast mental arithmetic" is different from "mental arithmetic" and "hand-brain arithmetic".
It is mainly through certain rules in the textbook to train children in addition, subtraction, multiplication and division for fast operation.
Fast mental arithmetic is not abacus mental arithmetic is not hand and brain arithmetic, without any calculation tools (such as abacus fingers), you can quickly write the correct answer when you look at the problem, fast mental arithmetic is consistent with the primary school mathematics calculation method, but it is simpler than the primary school textbook, simple, easy to learn, and can make children really reduce the burden of the calculation method.
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