Fill in the appropriate number according to the rule______ ，______ ②1，3，7，15，31，______ ，127，255③1，1，3，7，13，______ ，______ ．

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• 1. How to fill in 3 / 4 1 / 2 1 / 3 () 4 / 27 (),
• 2. Fill in the number according to the rule: 1, 4, 9, 16, 25______ ，49，64．
• 3. 1,3,8,21,55 () () fill in the numbers according to the rules. How can the third grade explain to the children
• 4. Four children buy a ball together. The first child pays 1 / 3 of the total money paid by other children, and the second child pays 1 / 3 of the total money paid by other children 1 / 4, the third child paid 1 / 5 of the total amount paid by other children, and the four children paid 36.8 yuan. What's the price of this football?
• 5. 5, 0. 75, 0. 375, (), ()
• 6. Fill in the number according to the rule, 0.25, 0.5, 75%, 1 (), (), () how to fill in
• 7. Find the rule () 3.5 1.75 () 0.4375
• 8. Fill in the blanks according to the rule: 7 & nbsp; & nbsp; & nbsp; 3.5 & nbsp; & nbsp; & nbsp; 1.75______   0.21875．
• 9. 11x22+0.22x3300+330x4.4=
• 10. Find the law: one third, (), five and one-third, twenty-one and one-third
• 11. Fill in the numbers according to the rules: 2 and 1 / 4, 3 and 1 / 9, 5 and 2 / 16, 7 and 3 / 25, 11 and 5 / 36, 13 and 8 / 49, () /?
• 12. Find the law, 1,1,2,3,5,8,13, find the next five numbers
• 13. 19 36 9 68 4 84 () () find the rule and fill in two numbers after it
• 14. If Mt. Qomolangma is 8844m higher than sea level, it should be recorded as + 8844m. If the Turpan Basin is 155m lower than sea level, it should be recorded as + 8844m______ Mt. Qomolangma is higher than Turpan Basin______ Rice
• 15. What is the relative altitude between the lowest land in Turpan Basin and the world's highest peak, Mount Qomolangma, 155 meters below sea level? What is the relative height between the altitude of Turpan Basin, the lowest land in China, 155 meters below sea level and the world's highest peak, Mount Qomolangma?
• 16. As shown in the picture, the highest point on the land is the summit of Mount Everest, and the lowest point is located in the Dead Sea Lake in Western Asia. What is the height difference between the two places? Mount Everest: 8844.43 m dead sea: - 415 M
• 17. Everest, the highest peak in the world, is 8844m higher than sea level, which is expressed as + 18844m. Then the height of sea level is expressed as + 18844m（
• 18. As shown in the picture, the highest point on the land is the peak of Mount Everest, 8844.4 m, and the lowest point is located in the west of Asia, the lake called dead sea, which is less than 415 from the sea level
• 19. How many meters is Mount Everest, the highest peak in the world?
• 20. 2. The altitude of the highest Mount Everest in the world is 8844m, and the altitude of the lowest Dead Sea is - 400m. The relative altitude of the two places is () A. 8844m b.9244m c.12844m d.2212m