It is known that: a divided by four fifths = B multiplied by seven sixths = C multiplied by four ninths = D divided by eight eighths, and a B C D is not zero, then the largest is ()?

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• 1. 7 () 9 times 8 is about 5600. What number can I fill in the brackets
• 2. Simple calculation of 0.9 + 1.9 + 29.9 + 399.9 + 4999.9
• 3. 5 / 17 + 5 / 17 * 16 (Mathematics, simple calculation)
• 4. 0 5 8 17 { } 37 48 Digital reasoning
• 5. 1.2 times 2.5 plus 0.8 times 2.5
• 6. Divide 16 by 2.5 and write down the simple method. Use the simple method to calculate. 1125-997 = 998 + 1246 + 9989=
• 7. If you can calculate simply, you should calculate simply. (1 / 13 + 1 / 16) × 13 × 16 12 × (1 / 3 + 1 / 2 + 1 / 6)
• 8. Simple calculation: 1 / 5 * 8 + 1 / 8 * 11 + 1 / 11 * 14 + +1\95*98+1\98*101
• 9. Simple calculation of 17 × 10.5
• 10. How about (4 / 17 + 1 / 25) * 17 * 25,
• 11. (11 of 11-36) + (11 of 9-36 multiplied by 5) + (11 of 1-36 multiplied by 9) + (11 of 3-36 multiplied by 7) + (11 of 7-36 multiplied by 11) should have a process
• 12. 2 out of 5 times 3 out of 8 times 10 out of 9= Four by one twelfth by three fourths= Seven eighties by twenty-five twenty-four by three fourths= One quarter by eighteen fifths by twenty-five twelfth= 15 / 4 by 8 / 3 by 9 / 25= Two ninths by three Sevens by three eighties= Five out of two by twenty-seven out of ten by five out of twelve=
• 13. Two out of nine times four denotes (), and can also denote () Don't despise me! I will, but I'm not sure
• 14. (- 7-6 / 12 + 9-4 / 8) × (- 36) =? A simple method to calculate
• 15. 18: The ratio of 3.6 to the simplest integer is______ The ratio is______ ．
• 16. First calculate the ratio, and then turn them into the simplest integer ratio 18:27 1.5:0.25 3 / 14:6 First find the ratio, and then turn them into the simplest integer ratio 18：27 1.5：0.25 3/14：6/21 0.7m：3/4m
• 17. 1) 1 / 3 ton: 250 kg into the simplest integer ratio is () ratio is (). 2) 30% of a number is 7 / 10, 1% of this number/ 1) 1 / 3 ton: 250 kg, the simplest integer ratio is (), the ratio is () 2) 30% of a number is 7 / 10, and 1 / 7 of the number is () 3) Cut the 8 / 5 meter long rope into 5 sections, each section is () long, and each section accounts for () of the total length It's due tomorrow. It's urgent Come on! Experts write the process or explain it! It's hard!
• 18. The ratio of 5 / 7:10 / 21 to the simplest integer is (), and the ratio is ()
• 19. The ratio of 2 / 5 to 3 / 4 is () and the ratio is ()
• 20. The simplest integer ratio of 3:5 to 1 is () and the ratio is ()