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Can abacus calculate multiplication and division?
Yes, I'll give you a decision: abacus formula table addition formula table no carry add carry add straight top five add into ten break five into ten add one up one down five go four one go nine into one two up two
How to use the abacus to calculate multiplication should be popular and easy to understand
There are two kinds of division by abacus: division by return and division by quotient. Division by return is calculated by pithy formula, which includes nine return pithy formula, retreat pithy formula and nine quotient pithy formula. Nine return pithy formula has 61 sentences: division by one: every one enters one, every two enters two, every three enters three, every four enters four, every five enters five, every six enters six, every seven enters seven, every eight enters eight, every nine enters nine
How does abacus calculate the square root?
Abacus power can be directly multiplied, or according to the formula. If the power of a higher power is prime, it can only be directly multiplied. If it can be decomposed into factors, it can be decomposed into factors to calculate again. The square root of abacus generally has the method of half ninety-nine square root, the method of product difference square root, the method of formula square root, the method of increasing multiplication square root, the method of cubic root root root root, and the method of increasing multiplication square root
RELATED INFORMATIONS
- 1. Who can illustrate the abacus or explain the calculation method of the abacus in spoken language?
- 2. Change the operation order of 671 + 29 × 4 ÷ 2 to sum first, then to product, and finally to quotient______ ．
- 3. (- 15) how much is 16 times yourself What do I say is equal to? What is the 16th power of minus 15
- 4. How much is 8 times 12.5%?
- 5. Can you tell me how these figures are equal to six It's OK to add, subtract, multiply and divide, as long as it's equal to six These numbers can't be changed,
- 6. 14-（-12）+（-25)-17=
- 7. What is 2 * sqrt (3-2 * sqrt (2)) + sqrt (17-12 * sqrt (2)) The sqrt above means the root sign. How to solve this problem, the final result is 1,
- 8. 16 degrees 4 seconds divided by 5 =?
- 9. How much divided by 2 / 3 = 3 / 4
- 10. 39 times 50 () 2000 62 times 31 () 1800 52 times 29 () 30 times 52 19 times 38 () 20 times 40 The brackets must be greater than, less than or equal to
- 11. 6.47*52+64.7*4.8
- 12. 150 three step recursive equation calculation problem urgent! There must be three steps
- 13. Simple calculation: 12 × (11 / 12-7 / 30) × 30 4 and 1 / 5-1 / 6 - (5 / 2-5 / 6) 4.38-1.56 + 0.62-0.44 13 out of 16 × (9 out of 13 × 17-9 out of 13)
- 14. Simple calculation of 0.56 times 301
- 15. Simple calculation of (3 / 8 + 2 / 17) × 8 + 1 / 17
- 16. Can you draw a 15 degree angle with a triangle ruler?
- 17. How much is 1000 plus 40 plus 1000 plus 30 plus 1000 plus 20 plus 1000 plus 10
- 18. The students went to plant trees. In the first group, 20 trees were planted at 30 points, and in the second group, 12 trees were planted at 18 points. Which group planted trees faster than others in the same lesson,
- 19. Four (1) class students plant trees, each plant one tree, there are 20 trees left, each plant two trees, the difference is 30 trees. How many students? How many saplings?
- 20. Class 51 is divided into three groups to plant trees. The first group has 15 people to plant 6 trees, the second group has 18 people to plant 7 trees, and the third group has 24 people to plant 13 trees?