What is the fractional advance rate of 85 decimeter belt? What is the fractional advance rate of 940 centimeter belt? What is the fractional advance rate of 1025 square decimeter belt?

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• 1. How many square decimeters is 7 square meters and 50 square decimeters
• 2. (negative 11 and 2 / 3) - (negative 7 and 2 / 5) - 12 and 1 / 3 - (- 4.2) =?
• 3. It's more than five sixths of 12. What's two fifths of 25 What's the product of five fourths minus its reciprocal and multiplying the difference by five sixths?
• 4. The result of calculation (+ 1.25) + (- 3 and two fifths) + (- 188;) + (- 0.6) is ()
• 5. Negative 1 / 3, 2 / 8, 3 / 15, 4 / 24, 5 / 35, 6 / 48, X / Y 1. The value of X and Y 2. Write out the nth number (n is divided into odd number and even number, discuss the sign of number, expressed by n)
• 6. Help me to work out a problem: a thing has nine sides, the probability of each side is one ninth, continuous throwing 7 times, at least once, what is the probability of the ninth side
• 7. 1 / 3 + 1 / 5 + 1 / 5 + 1 / 7 + 1 / 7 + 1 / 9 + 1 / 9 + 1 / 11 + 1 / 13 + 1 / 13 + 1 / 15 + 1 / 17 1 ／ 3 + 1 / 3 ／ 5 + 1 / 5 ／ 7 + 1 / 7 ／ 9 + 1 / 9 ／ 11 + 1 / 11 ／ 13 + 1 / 13 ／ 15 + 1 / 15 ／ 17
• 8. 9 and 5 / 7 - (2 and 1 / 13 + 4 and 5 / 7 + 11 / 13)
• 9. Simple calculation of 2002 / 1 × 3 + 2002 / 3 × 5 + 2002 / 5 × 7 + 2002 / 7 × 9 + 2002 / 9 × 11
• 10. Recursive equation calculation: 17.8 + 6.3 △ (3.2 minus 1.6)
• 11. (appropriate band score) 29 hours = () minutes 339 minutes = () hours 119 square minutes = () square meters
• 12. In the brackets below, fill in the appropriate band score 90 points = (), 1132m = () km 109 Jiao = () yuan 106 square centimeter = () square decimeter
• 13. Fold a 20 cm long rectangular paper in half and cut it along the crease to get two identical squares. Calculate the perimeter and area of the original rectangle xiangxi
• 14. A square colored paper is divided into two identical rectangles. The perimeter of each rectangle is 24 decimeters. How many square decimeters is the original square paper area? Can you explain it clearly and in detail
• 15. An area of 2 square meters of rectangular paper, fold three times after the small rectangular area is () square meters A. 12B. 13C. 14D. 18
• 16. Fold a rectangular paper in half for three times, and the area of each small rectangular paper is () A. 25%B. 50%C. 12.5%
• 17. As shown in the figure, the area of the shadow part is 12 square centimeters. How many square centimeters is the area of the blank part?
• 18. The area of the square in the picture is 12 square centimeters. What's the area of the shadow?
• 19. The perimeter of a rectangle is 4 / 7 meter, and the length is 1 / 5 meter. How many square meters should the rectangle be? (widening by different methods) Please friends, urgent How to make a formula
• 20. A cuboid glass jar, 8 decimeters long, 6 decimeters wide, 4 decimeters high, 2.8 meters deep Cube iron, how many liters of water in the tank overflow?