A two digit number, the sum of one digit number and ten digit number is 6. Exchange these two numbers, and the new number is 18 less than the original number. How much is the original number equal to?

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• 1. A two digit number is greater than the sum of the number in the ten digits and the number in the individual digits. 9. If you exchange the number in the ten digits and the number in the individual digits The obtained two digits are 27 larger than the original two digits. Find the two digits
• 2. Definition: if there are two two digits, and the number of ten and ten of any one digit is the number of ten and ten of another digit respectively, then such two digits are called "mutually friendly two digits" (1) Try to explain the reason why the difference between two digits must be a multiple of 9; (2) Based on the above experience, what conclusions can you draw?
• 3. There is a two digit number. If you transpose its digits A and ten digit number B, under what circumstances will you get two digits larger than the original two digits? There is a two digit number. If you transpose its digits A and ten digit number B, under what circumstances will you get two digits larger than the original two digits? Under what circumstances will you get two digits smaller than the original two digits? Under what circumstances will you get two digits equal to the original two digits?
• 4. There is a two digit number, the sum of the number on the ten and the number on the one is 8. If you transpose the number on the ten and the number on the one, the two digits obtained will be multiplied by the original two digits, and 1855 will be obtained
• 5. Please answer the math problem of grade 6 in detail, thank you! (22:18:20:37) A batch of parts, first processing 160, and then processing the remaining two fifths, at this time, the number of processed parts and the remaining parts are equal, how many parts are there in this batch of parts
• 6. Practical questions (6 21:14:26) Yang Hui, a mathematician in the Southern Song Dynasty, once put forward such a question: "the area of Zhitian (rectangle) is 864 (square steps), only the width (width) of cloud is less than 12 steps (width is 12 steps less than length). How many steps are the length of the problem and its specific solving process
• 7. Please answer the math application questions of grade 2 in detail, thank you! (6 21:14:30) Yang Hui, a mathematician in the Southern Song Dynasty, once put forward such a question: "the area of Zhitian (rectangle) is 864 (square steps), only the width (width) of cloud is less than 12 steps (width is 12 steps less than length). How many steps are the length of the problem and its specific solving process
• 8. 1.168÷4=?2.155÷5=?3·246÷6=?4.488÷2=?5.630÷7=?6.213÷3=?
• 9. The product of five rational numbers is the following 10 numbers: - 12, 0.168, 0.2, 80, - 12.6, - 15, - 6000, 0.21, 84100. Please confirm these five rational numbers and briefly explain the reasons
• 10. The product of five rational numbers is the following 10 numbers: - 12, 0.168, 0.2, 80, - 12.6, - 15, - 6000, 0.21, 84100. Please confirm these five rational numbers and briefly explain the reasons
• 11. [mathematics of grade one] a two digit number, a on the tenth digit and B on the tenth digit. A new two digit number is obtained by exchanging the numbers on the tenth digit and the single digit A new two digit number is obtained by exchanging ten digit numbers with one digit numbers Try to explain that the sum of the original two digits and the new two digits is a multiple of 11, and the difference is a multiple of 9
• 12. There is a two digit number. The number above ten is one half of the number above one. If the number above ten is exchanged with the number above one, the new two digit number will be obtained The number is 36 larger than the original two digit number. Find the two digit number
• 13. （11/18+8/9）×2/3×1/2＝
• 14. 3/8+2/5+9/11+1/5+2/7+3/5+1/4+4/9+3/7+2/9+5/8=?
• 15. (-3)÷-3÷|1/3-1/2|-(8-11)*2
• 16. Mathematics problem of grade one in junior high school: the process of 1 / 60 △ (1 / 4-1 / 5 + 1 / 3)
• 17. If the order of three digits is reversed, the sum of the three digits and the original three digits is 1171, and the three digits can be calculated
• 18. 8.9.10. 8. If you buy 10 jin eggs at a time, 20% discount is 3 yuan less than 10% discount, then the original price of 10 jin eggs is -------- yuan 9. The ratio of the three integers is 1:2:4, and their sum is 84. Then the largest number among the three integers is () A 56 B 48 C 36 D 12 10. To make a 5-meter-long and 3-meter-wide refrigerator without cover, the cost of box bottom is 60 yuan per square meter, and the cost of box wall per square meter is 2 / 3 of the cost of box bottom per square meter. If the total cost of the whole water tank is 1860 yuan, calculate the height of the water tank
• 19. If the sum of all the internal angles of a multilateral row and an external angle is 1000 degrees, then how many degrees is the external angle? How many sides is this row? Another question: the sides Ba and BC of the angle ABC are perpendicular to the sides ed and EF of the angle def, the perpendicular feet are m and N respectively, and the angle ABC = 60 degrees?
• 20. Word is not bad, reward points to how much!