What is 2m-4 divided by m-2?

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• 1. What percentage is 144 divided by 36?
• 2. How many parts is 3.14 divided by 400!
• 3. What is 2773 divided by 80?
• 4. What is 123 + 456? RT
• 5. Solution equation: 5x-2.2x = 5 × 3-1.2x
• 6. 5 / 18-2 / 21 = ()
• 7. (1+1/7+1/91/11）*1/7+1/9+1/11+1/21）-（1+1/7+1/9+1/11+1/21）*（1/7+1/9+1/11） (1 + 1 / 7 + 1 / 9 + 1 / 11) * (1 / 7 + 1 / 9 + 1 / 11 + 1 / 21) - (1 + 1 / 7 + 1 / 9 + 1 / 11 + 1 / 21) * (1 / 7 + 1 / 9 + 1 / 11) please calculate! Write the whole process!
• 8. Simple calculation 81 + 9 × 91 125 × 888 36 × 111 + 888 × 8
• 9. Plot outline of 21 to 40 chapters of outlaws of the marsh
• 10. The number of a is seven sixths, the number of B is four times less than five sixths
• 11. What is 18 / 0.6
• 12. () divided by 4 equals 0.75 equals 6 of () equals () divided by 16 equals 18: ()
• 13. What is 18 divided by 1% and 15
• 14. If a number a (a is not equal to 0) is a natural number, then 1 / 4 divided by a = () multiplied (), 1 / 4 divided by 4 = () multiplied () = ()
• 15. A = 2 × 3 × m, B = 3 × 5 × m (M is a natural number and M is not equal to 0). If the greatest common factor of a and B is 24, what is m
• 16. It is known that a, B, C, D are natural numbers, and a × B = 24, C × d = 32, B × d = 48, B × C = 24, ask a = 1___ ，B= ___ ，C= ___ ，D= ___ ．
• 17. a. B, C and D are four different natural numbers. The product of multiplication of these four natural numbers is 1988. Find the maximum and minimum of a + B + C + D
• 18. What's the ratio of 20 kg to 0.2 ton
• 19. What is the ratio of six to two fifths?
• 20. What's two fifths plus 0.6