If 2 / 5 of a is equal to 3 / 4 of B (A and B are not 0), then a: B=（

RELATED INFORMATIONS

• 1. Judge whether a right triangle with a = 5 / 4, B = 3 / 4 and C = 1 is right triangle, and try to explain your reason
• 2. If x is not equal to 5 / B, then - bx-5 / A + x = 2 holds, then the square of A-B =?
• 3. Solve the following equation a (x-1) = 2 (x + 1) (a is not equal to 0) the square of 1 / 2 (BX) = 0 (B is greater than 0)
• 4. How many square centimeters is 9 / 20 square meters? It's wrong, isn't it How many square decimeters is 9 out of 20 square meters?
• 5. How many centimeters is 20 meters
• 6. How much is 9 △ 5 and 1 / 4
• 7. 2 / 9 of a number is exactly equal to 2 / 5 of 20. What's the number
• 8. 5 and 4 / 9 equals
• 9. If ABC is a positive number and a + B + C = 1, find a square + b square + C square greater than or equal to 1 / 3
• 10. 1. A times 4 / 3 = 12 / 11 times b = 15 / 15 times C, and ABC is not equal to 0 The sum of the reciprocal of three prime numbers is 311 / 1001. The three prime numbers are () 3. The difference between the reciprocal of two consecutive odd numbers is 2 / 195, and the two consecutive odd numbers are () 4. A and B are two different natural numbers (both are not zero). The reciprocal of a multiplied by B and then multiplied by B is () Note: numerator / denominator, / is the fractional line
• 11. If 1 / 4 of a is equal to 1 / 5 of B, then a must be () B. (a, B are not zero) ① greater than ② less than ③ cannot be determined
• 12. Given a 6 = b 5 = C 4 ≠ 0 and a + b-2c = 3, the value of a is obtained
• 13. Given that a of B is two thirds and a is not equal to 2, find the value of A-B + 1 of a + B-5
• 14. Multiple choice questions: if a, B and C are not equal to 0, and 1 of a + 1 of B + 1 of C = 1 of a + B + 1 of C, then a, B and C are three Number () A. There must be two opposite numbers. B. there must be two equal numbers. C. There must be the same sign. D. none of the above conclusions is correct
• 15. Number a plus 0.12 equals number B minus 0.12, number a () number B. A equals, B is greater than, C is less than
• 16. If 60% of a is equal to three fifths of B, and neither a nor B is equal to 0, then () 1. The number of a is greater than that of B 2. The number of a is less than that of B 3. Number a equals number B 4. Unable to determine
• 17. If both a and B are natural numbers that are not equal to 0, and three-quarters of a is equal to two-thirds of B, then () 1. Number a > number B 2. Number b > number a 3. Number a = number B
• 18. A cuboid tank is 20 meters long, 15 meters wide and 2 meters deep. (1) the floor area of the tank? (2) the four walls and bottom of the tank are plastered with cement to calculate the area of cement? (3) how many tons of oil can be stored at most when the tank is used to store 0.85 tons of oil per cubic meter?
• 19. The answers to the third question on page 46 of the supplementary exercises of mathematics in Volume 2 of grade 6
• 20. Solving binary linear equations: (substituting elimination method)! （1）{x-y=3,① （2 ）{2s=3t,① {3x-8y=14；② {s= 2t+5/3；②