8 / 9 * [3 / 4 - (7 / 16-1 / 4)] simple operation

RELATED INFORMATIONS

• 1. Calculation question 1-2 + 3-4 + 5-6... + 2005-2006
• 2. 1-2-3 + 4 + 5-6-7 + 8 +... + 2005-2006-2007 + 2008
• 3. A. B is 64 kilometers away from each other. A and B ride bicycles from a and B respectively. B travels 4 kilometers more per hour than A. if a goes 40 minutes ahead of B, the distance they travel when they meet is exactly the same. What are the speeds of a and B?
• 4. 1. Cut a 20cm long iron wire into two sections, and make a square with the length of each section of iron wire as the perimeter. To make the sum of the two squares equal to 17cm ^ 2, what are the lengths of the two sections of iron wire? 2. The fruit shop paid 1500 yuan to buy a batch of fruit, which was priced at 50% of the profit. No one bought it, and decided to sell it at a discount, but still no one bought it. As a result, it sold out after another discount. After settlement, the total profit of this batch of fruit was 500 yuan. If the two discounts were the same, how much discount was given each time? (accurate to 0.1 fold)
• 5. A shopping mall in Shenzhen bought a batch of Hainan watermelons before the Spring Festival. They can sell 500 kg a day and make a profit of 0.3 yuan per kg. In order to reduce the inventory as soon as possible, the shopping mall decided to take appropriate price reduction measures. The survey shows that when the sales price is reduced by 0.1 yuan, the sales volume will be increased by 100 kg per day. If the shopping mall wants to make an average profit of 120 yuan per day, how much should the price be reduced per kg of watermelons?
• 6. The mileage of the railway from a to B is 480 km. From a to B, the train a with the word "g" and the train B with the word "d" can go directly to B. It is known that the average speed of train a is 40 km / h faster than that of train B, and the running time is 2 hours less than that of train B_____________ I can't ask the average speed and driving time of car a because I use my mobile phone to ask questions, Three hours or four hours
• 7. 6 + 9 + 12 + 15 + 18 + for math problems +303 6+9+12+15+18+…… +303
• 8. 4/15×6/8= 3/8÷12= 4/5×5/6= 36×5/18= 4/15×6/8= 3/8÷12= 4/5×5/6= 36×5/18= 2/3÷6/5= 6/25×5/18= 7/8×24= 7/12×1/14= 3/7-1/8= 13/25×200= 7/25×51/21= 3-5/18= 5/21×63= 8/19+11/19= 64×5/16=?
• 9. 18.5 * 9 / 7 + 16.5 * 9 / 11-5 help the teacher 18.5 times 7 / 9 plus 16.5 times 11 / 9
• 10. Mr. Liu said to Xiaotian, "my age 18 years ago is the same as your age 6 years ago. Five years ago, my age was seven times your age. How old is Xiaotian this year?
• 11. To solve the equation, 7 / 8-80% x = 1 / 2, the calculation should be simple. (1) 16 / 14 / 5 / 7 / 8 ② 13 / [(1 + 1 / 3) * 3 / 4]
• 12. Simple calculation of 7 / 5x divided by 8 / 9 = 2 divided by 3 The answer must be yes
• 13. How to simplify the calculation Speed Wuwu, I have to hand it in tomorrow Well, well speed
• 14. Simple operation (78.6-0.786 × 25 + 75% × 21.4) △ 15 × 2001
• 15. Simple calculation of 0.75 + 1.25 × 0.2 + 0.83.51-1.05-1.95 36.78-0.57 * 5-1.15
• 16. How to calculate 4.82 - (0.75-0.5) × 0.2
• 17. 8 / 25 * 0.25 + 1 / 4 * 57 / 25 - (1-0.75)?
• 18. 75 * 0.82 + 2.5 * 8.2 simple operation 13.75+45÷1.8*25 12.5*4.8÷1.5÷5
• 19. 8.55-2.6-0.9 simple calculation
• 20. 19.6 / (9.8 / 0.4) simple calculation 6.3/1.8 simple calculation