Is two fifths of one meter equal to one fifth of two meters?

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• 1. One half of two-thirds of a meter is () and one-third of a meter is two fifths of a meter The length: width: height of cuboid = 3:2:1, where the length is 12cm, the width is () the height is () the sum of the edge lengths is () the proportion of the length to the sum of the edge lengths, and the width is the proportion of the length to the length () 9 / 28 () = 6 △ () = 3 △ 4 = () (fill in decimal)
• 2. 5 × 7 / 3 + 7 × 9 / 3 + 9 × 11 / 3 + 11 × 13 / 3 + 13 × 15 / 3 (how to calculate?)
• 3. How to calculate 2 of 7 * 9 + 2 of 9 * 11 + 2 of 11 * 13 + 2 of 13 * 15
• 4. 1 * 3:1 + 3 * 5:1 + 5 * 7:1 + 7 * 9:1 + 9 * 11:1 + 11 * 13:1 + 13 * 15:1 =? Simple calculation
• 5. 1 × 3 / 1 + 3 × 5 / 1 + 5 × 7 / 1 + 7 × 9 / 1 + 9 × 11 / 1 + 11 × 13 / 1 A math problem
• 6. 1 * 3:1 + 3 * 5:1 + 5 * 7:1 + 7 * 9:1 + 9 * 11:1 + 11 * 13:1 =? It's easy, Mian
• 7. Simple calculation of 1:11 6 + 2:9 7 + 3:7 3 + 4:11 5 + 5:7 4 + 6:9 1
• 8. Simple calculation: 1 × 3:2002 + 3 × 5:2002 + 5 × 7:2002 + 7 × 9:2002 + 9 × 11:2002
• 9. A simple method is used to calculate: 455 × 7.6 + 111 × 19.2 + 43.3 × 76
• 10. Simple calculation method of 19 + 19 + 19 + 19 + 19 + 19 + 19 + 20
• 11. 2 / 3 + 2 / 8 + 2 / 15 + 2 / 24 + 2 / 35 + 2 / 48 + 2 / 63 + 2 / 80 After forgetting to write It's over
• 12. Using factorization calculation: 23 and three fifths * 25-12 and two fifths * 25 + 8 and four fifths * 25 The second way: the fourth power of 39 * 37-13 * 3 Calculation: 1.100 & sup2; - 99 & sup2; + 98 & sup2; - 97 & sup2; + 96 & sup2; - 95 & sup2; ··· + 2 & sup2; - 1 & sup2; The answer should be quick, good (NEAT) and correct. If it is done, (pay attention to the process)
• 13. It's more than five sixths of 12. What's two fifths of 25? Second: what's the product of five fourths minus his reciprocal and multiplying the difference by five sixths?
• 14. Simple operation of 15x (two thirds + two fifths) Wrong number, 15x (two thirds - two fifths) Simple operation
• 15. -Three and two thirds + - 2.4 - negative one third - negative four and two fifths
• 16. The sum of positive three and one third plus negative two fifths Negative two seventh, positive two thirds, negative one third, negative two sixth Given | m | = 1, | n | = 2, find the value of M + n
• 17. 2.06 square meters = () square meters () square decimeters 4700 kg = () tons () △ 20 = four fifths = 1.6: () = ()% = ()
• 18. How many square meters is 35.06 square meters
• 19. How many square decimeters is 2044 square centimeter
• 20. 206cm = () m 425 square cm = () square decimeter (with band fraction)