7 / 3, 21 / 24, 19 / 38, 13 / 52, 7 / 9, 93 / 24 which are the simplest fractions to solve in 3 minutes

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• 1. What is the simplest score of 19 out of 38
• 2. Simple calculation of 7.75 × [20 ÷ (3.24-3.07)] 7.75×【20÷（3.24－3.04）】。 Simple operation The wrong number on the top is not counted
• 3. Simple calculation of 17 / 24 - (4 / 5-7 / 24)
• 4. How about 17 / 24 × 3 / 4 + 17 / 24 △ 4
• 5. Simple calculation: 1 / 3 + (3 / 4-2 / 3) divided by 1 / 5 = 1-6 / 11 divided by 21 / 22-3 / 7= Simple calculation: 1 / 3 + (3 / 4-2 / 3) divided by 1 / 5 = 1-6 / 11 divided by 21 / 22-3 / 7 = ,
• 6. How to calculate 468-132 + 132-68 with simple algorithm
• 7. Simple calculation of 231 + 132 - (32 + 55)
• 8. Simple calculation: 32 * 33 * 34 * 35 / (4 * 5 * 6 * 7 * 8)
• 9. 9.6 × 0.25 × 4 = (simple calculation)
• 10. A simple calculation method of 999 × 21 + 666 × 45-333 × 53 Urgent! Homework tonight!
• 11. 5+55+555+5555+.555555555=
• 12. 33333 × 6 × 11111 + 22222, please 3Q The result is 2222200000, and it is fast
• 13. Is it ineffective to abandon method 9? (12345 + 51234 + 45123 + 34512 + 234511) / 3 = a.22222 b.33333 c.44444 d.55555 (12345 + 51234 + 45123 + 34512 + 234511) / 3 after 9 is 1 55555 after 9 is 7 What's going on?
• 14. How is 1996 * 2000-2000 * 1996 1996 the easiest
• 15. What is the simple calculation process from 2011 * 20022002 to 2002 * 20012001
• 16. How to divide 2002002 by 20012001
• 17. (87.65-19.36) - (47.15 + 11.64)
• 18. How to calculate the following questions （2/3）*6/（8/9）=?（3/4）/（6/7）/14=? （9/10）/（1-（3/8））=?(1/5)+(4/5)*(15/16)=? (17/2)/15*(5/7)=?(6/5)/4*(2/3)/(1/6)=? ）It's a score
• 19. The following questions, how simple on how to calculate Formula: 1, 0.76x4.2 + 3.1x4 2, 290.7-22.78 △ 3.1-33 3, 1.4x8.6 + 8.6x8.6 4, 0.24x2.5x12.5
• 20. Calculate the following questions in a simple way 15－5÷12－7/12 2－1/4－1/3－3/4 5/8－（5/8－1/2） 1/5×37%＋4/5×37% 1/6÷11/24－3/8×4//11 68－7.5＋32－2.5