Some mathematical problems about rational numbers The sum of all integers whose absolute value is greater than 1 but less than 6 is equal to_____ Write a fraction that is smaller than a negative quarter and larger than a negative third____ The rational number with square 81 is___ The reciprocal is equal to its number body____

Some mathematical problems about rational numbers The sum of all integers whose absolute value is greater than 1 but less than 6 is equal to_____ Write a fraction that is smaller than a negative quarter and larger than a negative third____ The rational number with square 81 is___ The reciprocal is equal to its number body____

1.0 2. Negative 7 / 24 3. Positive and negative 9 4. Positive and negative 1 must be correct
The distance from the point (- 2,1) to the line 3x-4y-2 = 0 is equal to______ .
According to the formula of distance from point to line, the distance from point (- 2,1) to line 3x-4y-2 = 0 d = | - 6 − 4 − 2 | 9 + 16 = 125, so the answer is: 125
Given a = 3b, C = 4A, the value of the algebraic formula 4a-9b + 3C / 3a-6b + C is () a.6b.13/5 c.13 d.16/7
According to the meaning of the title: a = 3b, C = 4A, then: B = A / 3,
Then: 4a-9b + 3C = 4a-9 * (A / 3) + 3 * 4A = 4a-3a + 12a = 13A
3a-6b+c=3a-6*(a/3)+4a=3a-2a+4a=5a
So: (4a-9b + 3C) / (3a-6b + C) = 13A / 5A = 13 / 5
Choose B
Division of rational numbers
"*" represents an operation. Given a * b = (a-b) / (2a-b), find the value of (- 2) * (- 3).) (note, * is not a multiplication sign)
（-2）*（-3)=(-2-(-3))/((-2)*2-(-3))=1/(-1)=-1
=1/（-1）=-1
（-2）*（-3）
=(-2-(-3)) ÷(2(-2)-(-3))
=(-2+3) ÷ (-4+3)
=1 ÷ (-1)
=-1
-1 according to the law it says = (- 2 + 3) (- 4 + 3) = - 1
-1
The distance from point P (2,1) to line 3x = 4Y = 5 = 0 is equal to?
3x = 4Y = 5 = 0. What's the symbol in front of it
If a ^ 2-4a + B ^ 2 + 6B + 13 = 0, 3a-5b=
(a-2)^2+(b+3)^2=0
a=2,b=-3
3a-5b=21
Division of rational numbers can also be converted into multiplication, so the kitchen of rational numbers has the following rules:
1. Divide two numbers____________________ .
2、______________________________ .
If two numbers are divided, the same sign is positive, the different sign is negative, and the absolute value is divided
Dividing by a number is equal to multiplying by the reciprocal of the number
0 divided by any number not equal to 0 is equal to 0
0 cannot be divisor
Divide two numbers by the reciprocal of one multiplied by another;
If two numbers are divided, the same sign is positive, the different sign is negative, and the absolute value is divided
Dividing by a number is equal to multiplying by the reciprocal of the number. (Note: 0 is not countdown)
Note: 0 divided by any number not equal to 0 is equal to 0
(1) Dividing by a number is equal to multiplying by the reciprocal of the number. (Note: 0 is not countdown)
(2) When two numbers are divided, the same sign is positive, the different sign is negative, and the absolute value is divided.
(3) 0 divided by any number not equal to 0 is equal to 0
(4) 0 cannot be divisor
No TWT, my rational number test is only 40 OTZ
If the same sign is positive and the different sign is negative, divide the absolute value by 0, and divide 0 by any number to get 0
What is the distance from point a (- 4,1) to the line 3x + 4Y-2 = 0
ax+by+c=0 (x0,y0)
|ax0+by0+c|/√(a^2+b^2)
Use this formula
The result is two
Let a real number satisfy a, B, C satisfy (a + b) (a + B + C) 4a (a + B + C)
Be specific, OK
Idea: what needs to be proved is that the discriminant > 0
That is to say, the formula ax ^ 2 + (B-C) x + (a + B + C) = 0 has two solutions
Take x = 1, left = 2 (a + b); take x = 0, left = a + B + C
And (a + b) (a + B + C) 0, deformation can be proved
In the last question of division of rational numbers in the seventh grade of junior high school, 3 and 4 and negative 6 and 10 are used to do the mixed operation of addition, subtraction, multiplication and division, so that the result is 24,
1:3 × (4 - 6 + 10) 2:3 × ((4 - 6) + 10) 3:3 × (4 - (6 - 10)) 4:3 × (4 + 10 - 6) 5:3 × ((4 + 10) - 6) 6:3 × (4 + (10 - 6)) 7:3 × 6 - 4 + 10 8:(3 × 6) - 4 + 10 9:(3 × 6 - 4) + 10 10:((3 × 6) -...
1: 3 × (4 - 6 + 10)
2: 3 × ((4 - 6) + 10)
3: 3 × (4 - (6 - 10))
4: 3 × (4 + 10 - 6)
5: 3 × ((4 + 10) - 6)
6: 3 × (4 + (10 - 6))
7: 3 × 6 - 4 + 10
8: (3 × 6) - 4 + 10... Expansion
1: 3 × (4 - 6 + 10)
2: 3 × ((4 - 6) + 10)
3: 3 × (4 - (6 - 10))
4: 3 × (4 + 10 - 6)
5: 3 × ((4 + 10) - 6)
6: 3 × (4 + (10 - 6))
7: 3 × 6 - 4 + 10
8: (3 × 6) - 4 + 10
9: (3 × 6 - 4) + 10
10: ((3 × 6) - 4) + 10
11: 3 × 6 -(4 - 10)
12: (3 × 6) - (4 - 10)
13: 3 × 6 + 10 - 4
14: (3 × 6) + 10 - 4
15: (3 × 6 + 10) - 4
16: ((3 × 6) + 10) - 4
17: 3 × 6 +(10 - 4)
18: (3 × 6) + (10 - 4)
19: 3 × (10 + 4 - 6)
20: 3 × ((10 + 4) - 6)
21: 3 × (10 + (4 - 6))
22: (3 × (10 - 4)) + 6
23: 3 × (10 - 4) + 6
24: 3 × (10 - 6 + 4)
25: 3 × ((10 - 6) + 4)
26: 3 × (10 - (6 - 4))
27: 4 + 6 ÷ 3 × 10
28: 4 + (6 ÷ 3) × 10
29: 4 + (6 ÷ 3 × 10)
30: 4 + ((6 ÷ 3) × 10)
31: 4 + (6 ÷ (3 ÷ 10))
32: 4 + 6 ÷(3 ÷ 10)
33: 4 + 6 × 10 ÷ 3
34: 4 + (6 × 10) ÷ 3
35: 4 + (6 × 10 ÷ 3)
36: 4 + ((6 × 10) ÷ 3)
37: 4 + (6 × (10 ÷ 3))
38: 4 + 6 ×(10 ÷ 3)
39: (4 - 6 + 10) × 3
40: ((4 - 6) + 10) × 3
41: (4 - (6 - 10)) × 3
42: 4 + 10 ÷ 3 × 6
43: 4 + (10 ÷ 3) × 6
44: 4 + (10 ÷ 3 × 6)
45: 4 + ((10 ÷ 3) × 6)
46: 4 + (10 ÷ (3 ÷ 6))
47: 4 + 10 ÷(3 ÷ 6)
48: (4 + 10 - 6) × 3
49: ((4 + 10) - 6) × 3
50: (4 + (10 - 6)) × 3
51: 4 + 10 × 6 ÷ 3
52: 4 + (10 × 6) ÷ 3
53: 4 + (10 × 6 ÷ 3)
54: 4 + ((10 × 6) ÷ 3)
55: 4 + (10 × (6 ÷ 3))
56: 4 + 10 ×(6 ÷ 3)
57: 6 - (3 × (4 - 10))
58: 6 - 3 ×(4 - 10)
59: 6 × 3 - 4 + 10
60: (6 × 3) - 4 + 10
61: (6 × 3 - 4) + 10
62: ((6 × 3) - 4) + 10
63: 6 × 3 -(4 - 10)
64: (6 × 3) - (4 - 10)
65: 6 + (3 × (10 - 4))
66: 6 + 3 ×(10 - 4)
67: 6 × 3 + 10 - 4
68: (6 × 3) + 10 - 4
69: (6 × 3 + 10) - 4
70: ((6 × 3) + 10) - 4
71: 6 × 3 +(10 - 4)
72: (6 × 3) + (10 - 4)
73: 6 ÷ 3 × 10 + 4
74: (6 ÷ 3) × 10 + 4
75: (6 ÷ 3 × 10) + 4
76: ((6 ÷ 3) × 10) + 4
77: (6 ÷ (3 ÷ 10)) + 4
78: 6 ÷ (3 ÷ 10) + 4
79: 6 - (4 - 10) × 3
80: 6 - ((4 - 10) × 3)
81: 6 × 10 ÷ 3 + 4
82: (6 × 10) ÷ 3 + 4
83: (6 × 10 ÷ 3) + 4
84: ((6 × 10) ÷ 3) + 4
85: (6 × (10 ÷ 3)) + 4
86: 6 × (10 ÷ 3) + 4
87: 6 + (10 - 4) × 3
88: 6 + ((10 - 4) × 3)
89: 10 + 3 × 6 - 4
90: (10 + 3 × 6) - 4
91: (10 + (3 × 6)) - 4
92: 10 + (3 × 6) - 4
93: 10 + (3 × 6 - 4)
94: 10 + ((3 × 6) - 4)
95: 10 ÷ 3 × 6 + 4
96: (10 ÷ 3) × 6 + 4
97: (10 ÷ 3 × 6) + 4
98: ((10 ÷ 3) × 6) + 4
99: (10 ÷ (3 ÷ 6)) + 4
100: 10 ÷ (3 ÷ 6) + 4
101: 10 - 4 + 3 × 6
102: (10 - 4) + 3 × 6
103: 10 - 4 +(3 × 6)
104: (10 - 4) + (3 × 6)
105: 10 - (4 - 3 × 6)
106: 10 - (4 - (3 × 6))
107: (10 - 4) × 3 + 6
108: ((10 - 4) × 3) + 6
109: (10 + 4 - 6) × 3
110: ((10 + 4) - 6) × 3
111: (10 + (4 - 6)) × 3
112: 10 - 4 + 6 × 3
113: (10 - 4) + 6 × 3
114: 10 - 4 +(6 × 3)
115: (10 - 4) + (6 × 3)
116: 10 - (4 - 6 × 3)
117: 10 - (4 - (6 × 3))
118: 10 + 6 × 3 - 4
119: (10 + 6 × 3) - 4
120: (10 + (6 × 3)) - 4
121: 10 + (6 × 3) - 4
122: 10 + (6 × 3 - 4)
123: 10 + ((6 × 3) - 4)
124: 10 × 6 ÷ 3 + 4
125: (10 × 6) ÷ 3 + 4
126: (10 × 6 ÷ 3) + 4
127: ((10 × 6) ÷ 3) + 4
128: (10 × (6 ÷ 3)) + 4
129: 10 × (6 ÷ 3) + 4
130: (10 - 6 + 4) × 3
131: ((10 - 6) + 4) × 3
132: (10 - (6 - 4)) × 3) put away