75 to 1

RELATED INFORMATIONS

• 1. 24 to 8 to 12
• 2. Simple calculation of (32 × 75 × 12) / (15 × 24 × 8)
• 3. -(- 16) how to simplify symbols? And - (+ 20) + (+ 50)
• 4. 12.56:3.14 reduction ratio
• 5. 50 cm: 1 / 4 4.5 DM: 90 cm 4 hours: 1 / 4 4.5 DM: 90 cm 4 hours: 1 / 4 4.5 DM: 90 cm 4 hours: 1 / 4 hours
• 6. The ratio of simplification is 1,2,2:12,2:1,2:3,1:5 3. 1.2:6:2 of 25 and 2 of 5 As long as the answer, not the process Thank you
• 7. Simplify the following 7:54:21 0.25:0.75 2:4 1.5:90 4:8 1.5cm:5km
• 8. 8 points 5:4 reduction ratio
• 9. Simplification ratio: 6.8 out of 2.4=
• 10. 49.5 x 3 / 5 - (50-1 / 2) x 3 / 5 can be calculated simply!
• 11. Two two digit numbers are different from each other, for example: 12 * 63 = 21 * 36
• 12. Reduce the score to 3 / 6, 15 / 20, 8 / 21, 36 / 72, 42 / 35
• 13. According to 9 out of 5, 16 out of 12, 25 out of 21, 36 out of 32, what is the nth one, which is denoted by letter N (≥ 1)
• 14. Balmer, a Swiss middle school teacher, has successfully extracted spectral data from 9 / 5, 16 / 12, 25 / 21, () 49 / 45, 94 / 60, 81 / 77 What's in the middle What is the law
• 15. Balmer, a middle school teacher in Switzerland, collected spectral data from 95161225213632 We successfully found the law in, and got Balmer formula, and then opened the door to the mystery of spectrum. Please write the ninth number according to this law?
• 16. How to find the law How to find the law
• 17. Through the hyperbola x ^ 2 / 4-y ^ 2 / 3 = 1, the left branch of the straight line intersection of the left focus F1 is at the Mn point, and F2 is its right focus, then the value of | MF2 | + | NF2 | - | Mn | is? I don't know where Mn = MF1 + NF1 comes from
• 18. There is a plane that can fly in the air for up to four hours There is an aircraft that can fly in the air for up to 4 hours. Its speed when flying out and returning is 950km / h and 850km / h respectively. How many hours can this aircraft fly in the air at most? The question is how many kilometers
• 19. For a 1500 meter long elevated road, one sixth of the total length was built in the first month, and one fourth of the total length was built in the second month. How many parts are left unfinished?
• 20. (1)23-17-(-7)+(-16) (2)123×80%=x×(1+10%) (1)23-17-(-7)+(-16) (2)123×80%=x×(1+10%) (3) 1 - (1-0.5) △ 3 × [2 - (- 3) power]