To solve the equation: 0.2 of 0.3x + 0.5-0.03 of 0.02-0.05x = 3 of 2x + 1

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• 1. x/0.3-（0.03+0.05x）/0.02+4=0
• 2. The solution of X / 0.3 - (0.03 + 0.05x) / 0.02 + 4 = 0
• 3. a. B, C and D are four rational numbers whose absolute values are 1, 2, 3 and 4 respectively (1) Please write two formulas so that a + B + C + D = - 2 Formula 1:_____________ Formula 2:_____________ (2) Can you write a formula so that a + B + C + D = - 1:1______ (fill in "can" or "can't")
• 4. The rational number with the smallest absolute value is () A. 1b. 0C. - 1D. Does not exist
• 5. What's wrong with the following statement is that 0 is not a positive number
• 6. The following statements are correct: (1) a rational number is not an integer or a negative number; (2) a rational number is not an integer or a fraction
• 7. In the following statement of 0, it is true that a.0 is neither positive nor negative, b 0 is the smallest integer, C 0 is a rational number, and d 0 is a non negative number The diameter of a part is 30 + 0.03-0.02 unit mm in the drawing, which means that the standard size of the part is 30mm, and the maximum machining size is required not to exceed () a.0.02 b0.03 c30.03 d29.98
• 8. A is a rational number, then the following statement is correct: A is a positive number B - a C A and - a must have a negative number d a and - a represent a pair of opposite numbers
• 9. If a denotes a rational number, then the following statement is correct: a | a | must be a positive number; B - (- a) must be a positive number; C if - | a | must be a negative number D | a | must not be less than a
• 10. If a is a rational number, then the following statement is correct: |a | must be a positive number | - a | must be a positive number - |a | must be a negative number |a | + 1 must be a positive number
• 11. 0.3 of X + 4 = 0.02 of 0.03 + 0.05x
• 12. (1) 0.4x + 0.9-2 = 0.03x of 0.03 + 0.02 + 1 (2) 5 x + 15 = 1-3 X-7 of 2 (3) 1 out of 3 [1 out of 2-1 out of 4 (2x-5)] + x = 2 out of X + 1. You will get extra points after solving the problem
• 13. To solve the equation: y-1-y + 3 / 5 = 3y-1 / 2
• 14. Solve the equation: 2.4 minus 0.5 (y-4) is equal to 5 / 3Y 2.4-(y-4/0.5)=3/5y
• 15. The solution equation: 32y (Y − 83) = 3Y − 4
• 16. Solution equation: 2 (2 − 3Y) 0.01 − 4.5 = 0.03 − 3y0.03-9.5
• 17. The sum of number a and number B is 13.2. If the decimal point of number a moves one place to the right, it is equal to number B. what are the two numbers?
• 18. Q: the sum of a and B is 236.5. If a moves the decimal point one place to the right, it is equal to B. what are the two numbers?
• 19. The sum of a and B is 303.49. If the decimal point of B moves one place to the left, it is equal to A. what are the two numbers? The answer is yes, but how to explain it to the child? The son asked why he divided it by 11, but he couldn't explain it. Who can explain it? Grade 4 of primary school
• 20. The sum of a and B numbers is 34.155. If the decimal point of a number moves one place to the left, it is equal to B number. How much is each of a and B numbers?