The comparison of absolute values in mathematics volume 1 of Grade 7 How to do it

RELATED INFORMATIONS

• 1. It is known that a and B are opposite to each other, and they are not 0, C and D are reciprocal to each other, and the absolute value of X is 5?
• 2. Given that a and B are opposite numbers, C and D are reciprocal numbers, and the absolute value of X is 2, find the value of a + B + CDX + 2010 of 201x
• 3. Given that a and B are opposite numbers, C and D are reciprocal numbers, and the absolute value of X is 2, find the value of a + B + CDX + 2010 of 201x X is a multiplication sign It's a + B + CDX + 2010
• 4. a. The absolute value of inverse number C and reciprocal number x of D is 2 A + B / 2010x + CDX + 2010 =?
• 5. Calculation: how much is the square of a divided by B * 1 / b divided by c * 1 / C divided by D * 1 / D?
• 6. Proof: the square of a divided by B + C plus the square of B divided by a + C plus the square of C divided by a + B is greater than or equal to two parts of a + B + C
• 7. If √ 3sin α + cos α = 2 / 3, then cos (2 α + π / 3) is equal to
• 8. Given that Tana and tanb are two real roots of the equation x2-4px-3 = 0, and a + B ≠ K π + π / 2, we can find the value of Cos2 (a + b) + PSIN (a + b) cos (a + b)
• 9. The reduction of ((1 + Cos2 α) / (3sin2 α)) * ((2sin2 (α)) / Cos2 α)
• 10. If A-B = π / 6, Tana tanb = 2 √ 3 / 3, find cosacosb=_____
• 11. Fill in the blanks of absolute value in Volume 1 of Grade 7 |-The meaning of 3.8 | is (), | - 3.8 | = () |The meaning of 16 is (), | 16 | = () |The meaning of 0 | is (), | 0 | = ()
• 12. Three questions for filling in the blanks of absolute value in Volume 1 of Grade 7 The meaning of a is: the distance between the point of the number () and () on the number axis If x = 5, then x = ()
• 13. There are strict regulations on the quality of football used in formal football matches. The following are the quality test results of six football matches (use positive numbers to record the grams that exceed the specified quality, and use negative numbers to record the grams that are less than the specified quality): - 25, + 10, - 20, + 30, + 15, - 40
• 14. The problem of finding the absolute value of mathematics in the first volume of the seventh grade 1. If the absolute value of a is equal to 2 and B is equal to 1, then the absolute value of a + B is? 2. The detection results of some football are negative 25, positive 10, negative 20, positive 30, positive 15, negative 40, which football is of good quality, and use the knowledge of absolute fat to explain. 3. It is known that A.B is a rational number, and / 3a-1 / + / 2b-5 / = 0, you can find the value of a and B according to the definition of absolute value 4. / A-1 / equals 4, then a is equal to?
• 15. one Scientific experiments show that the charge of the nucleus and electron in the atom are two opposite charges. Physics stipulates that the charge of the nucleus is positive, and the charge of the nucleus and electron in the hydrogen atom is one charge each. The charge they carry is expressed by positive and negative numbers. I know about positive and negative numbers, but I don't know about nucleus, electron and charge
• 16. (1) If - a = - 4, then a =?; if the opposite number of - A is - 6, then a =? (2) how many negative integers have absolute values greater than 2.5 and less than 7.2? (3) If | M-1 | = M-1, then M is greater than or less than or equal to 1 (4) If 2 < a < 4, then | 2-A | + | A-4 | = what (5) Given that | a | = 2, | B | = 3, and B < A, then A-B = what
• 17. The number whose absolute value is greater than 2 / 3 and less than 8 / 3 is ()
• 18. If the side length of the triangle ABC is a, B, C, the square of a + the square of B + the square of C + 338 = 10A + 24B + 26c, try to judge the shape of the triangle
• 19. 20 exercises of merging similar items of rational numbers
• 20. Several problems of merging similar items in grade one of junior high school ①n-{n-2+[5m-3(n+2m)+6n]}+2n ②½x-2（x-1/3y²）+（-3/2x+1/3y²） ③2（t²-t-1)-(t²-t-1)+3(t²-t-1) ④-5（2m-n)-6(2n-3m) ⑤-3（ab-5b²+2a²）-3（7ab+1ba²-25b²）