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Anonymous users2024-02-07Go to the post office and ask for it, you can order it by mail.
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Anonymous users2024-02-06Twenty sixteens minus two sixteens, or ten eighteen plus six eighteen 55 squared plus 55 275 + 2750 + 55
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Anonymous users2024-02-05A dozen times a dozen:
Formula: head by head, tail by tail, tail by tail.
Example: 12 14=?
Solution: 1 1=1
Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.
2.The heads are the same, the tails are complementary (the sum of the tails is equal to 10):
Formula: After adding 1 to a head, the head is multiplied by the head, and the tail is multiplied by the tail.
Example: 23 27=?
Solution: 2 1 3
Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.
3.The first multiplier is complementary, and the other multiplier number is the same:
Formula: After adding 1 to a head, the head is multiplied by the head, and the tail is multiplied by the tail.
Example: 37 44=?
Solution: 3+1=4
Note: Multiply the single digits, and use 0 to occupy the place if the two digits are not enough.
4.Tens of one by dozens of one:
Formula: head by head, head by head, tail by tail.
Example: 21 41=?
Solution: 2 4=8
Multiply by any number: formula: the end does not move down, and the sum of the middle pulls down.
Example: 11 23125=?
Solution: 2+3=5
2 and 5 are at the beginning and end respectively.
Note: and full ten to one.
6.A dozen times any number:
Example: 13 326=?
Solution: 13 digits are 3
Note: and full ten to one.
If you have any questions, you can ask, if you have solved the problem and click to adopt, your adoption will encourage us to better answer other netizens, thank you.
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Anonymous users2024-02-04The theorem for special problems in the one-minute quick calculation formula is: any two-digit number multiplied by any two-digit number, as long as the Wei-style coefficient is "0", the product obtained by the tail multiplied by the tail of the two numbers must be the product of the back, the product of the head multiplied by the head (the sum of the head plus 1 of one of the terms) is the front product, and the product obtained by the two adjacent products.
For example, (1) 33 46 = 1518 (the sum of single digits is less than 10, so the small number of ten digits 3 remains unchanged, and the number 4 of ten digits must be added to 1).
Calculation method: 3 (4+1)=15 (front product), 3 6 = 18 (back product).
The two products make up 1518
For example, (2) 84 43 = 3612 (the sum of single digits is less than 10, the number of tens and the small number of 4 does not change, and the number of tens and the number of the large number 8 plus 1).
Calculation method: 4 (8+1)=36 (front product), 3 4 = 12 (back product).
Two adjacent products: 3612
For example, (3) 48 26 = 1248
Calculation method: 4 (2+1)=12 (front product), 6 8 = 48 (back product).
Two products: 1248
For example, (4) 245 square = 60025
Calculation method 24 (24+1)=600 (previous product), 5 5=25
Composition of two products: 60025
ab cd Wei coefficient = (a-c) d + (b+d-10) c
The head is multiplied by the head, the tail is multiplied by the tail, and the zero is a whole, and the remainder is supplemented. ”
1.First, find the Wei coefficient.
2.The head multiplied by the head (one of which plus one) is the front product (the number of the adapted tail sum is 10).
3.The tail multiplied by the tail is the posterior product.
4.The two products are connected, and the Wei coefficient can be added to the ten digits.
For example: 76 75, 87 84, where the number of tens of digits and the same single digit is added to 11, its Wei coefficient must be its ten-digit number.
For example, the 76 75 Wei coefficient is 7, and the 87 84 Wei coefficient is 8.
For example, 78 63, 59 42, their coefficients must be ten digits larger minus its single digits.
For example, the Wei coefficient of the first question is equal to 7-8 = -1, and the Wei coefficient of the second question is equal to 5-9 = -4, as long as the ten digits are one difference, the number of single digits added to 11 can be calculated quickly by the above method.
Example 1 76 75, Calculation: (7+1) 7=56 5 6=30 The two products make up 5630, and then add 7 to the ten digits, and the final product is 5700.
Example 2 78 63, calculation: 7 (6+1)=49, 3 8=24, two products form 4924, then subtract 1 from 2 on the ten digits, and the final product is 4914.
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