What is a number that is three-thirds larger, two-thirds less, divided by two, plus one-quarter equal to seven twelfth

eight-ninths

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1. The radii of circle O1 and circle 02 are 3cm and 4cm respectively. Under the following conditions, the position relationship between circle O1 and circle O2 can be obtained (1) O1O2 = 8 cm (2) O1O2 = 7 cm (3) O1O2 = 5cm (4) O1O2 = 1cm (5) O1O2 = 0.5cm (6) 01 and O2 coincide
2. A cylindrical steel is 1 meter long and 1 cm in cross-sectional diameter. How many cubic centimeters is the volume of this steel? If each cubic centimeter of steel weighs 7.5 grams, how many kilograms does this steel weigh?
3. A simple method to calculate 15 × (4 + 20)=
4. 25 1 / 3 - [(20-15 3 / 4) + (13 3 / 4-17)]
5. The process of finding [6 and 5 / 3 - (8.5-1 / 3) △ 3.5] × (2 and 18 / 5 + 12 / 11)
6. 5 / 9 + 3 / 11 + 4 / 9 + 8 / 11 + 7 / 18 △ 4 + 3 / 4 × 7 / 18 (1 / 4-1 / 6) × 12 5 of 9 + 3 of 11 + 4 of 9 + 8 of 11 + 7 of 18 △ 4 + 3 of 4 × 7 of 18 (1 of 4-1 of 6) × 12 important process
7. 4 + 4 + 1 / 2 * 6 / 7 / 9 / 5 of 14 -- (1 + 5 / 6 + 1 + 11 / 18)
8. 1 out of 18 + (2 out of 3 + 4 out of 21) = = = How much is it?
9. （1/1*4）+（1/2*5）+（1/3*6）...+（1/17*20）+（1/18*21）=?
10. 13-[26-(-21)+（-18)]=
11. Given that the equation x2 + IX + 6 = 5x + 2I has real roots, try to find two roots of this equation
12. The formula 35 divided by 8 is equal to 4. 3 can solve many problems in life. Please write a mathematical problem solved by this formula
13. It is known that circle C1: x square plus y square plus 3 is equal to 0. If circle C2 and circle C1 are circumscribed and tangent to the line L: X equal to 1, the trajectory equation of the center of circle C2 is obtained If the tangents of circle C1 are equal on the x-axis and y-axis, the tangent equation is obtained
14. The expression of time (English) 1:40 1:50 1:55 o (∩)_ Good drops have points and adopt~
15. If x is known to be an acute angle, SiNx = 3-m / M + 1, cosx = 2m-1 / M + 1, then M =? Tana =? In a hurry
16. 75 times 31 / 5 plus 2.8 divided by 4 / 11 plus 11 / 4 equals
17. Given the quadratic function f (x) = ax & # 178; + BX + C, if a > b > C and f (1) = 0, it is proved that the image of F (x) and X axis have two different intersections
18. The conversion of degree, minute and second: 22 ° 18 '= () 36.4' = () () () '"
19. Solution equation: 2x + 4 = - 3x + 15
20. Xiao Ming asked his father how old he was, and he said, "divide my age by 6, add 14, multiply by 3, and finally subtract 27. It's 33 years old."