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Simple method 23 and three fifths * 25-12 and three fifths * 25 + 8 and two fifths * 25 (18 and three fifths) square - (16 and seven fifths) square
23 and three fifths * 25-12 and three fifths * 25 + 8 and two fifths * 25 = (23 and three fifths - 12 and three fifths + 8 and two fifths) * 25 = (19 and two fifths) * 25 = (20-three fifths) * 25 = 20 * 25-three fifths * 25 = 500-15 = 485 (18 and three fifths) square - (16 and seven fifths) square = (18 and five fifths)
RELATED INFORMATIONS
- 1. How to correct 5 out of 7-2 out of 15-12 out of 30
- 2. If you look at the following formulas, what rules do you find? 3 × 5 = 15, and 15 = 42-1; 5 × 7 = 35, and 35 = 62-1,11 If you look at the following formulas, what rules will you find? 3 × 5 = 15, and 15 = 42-1; 5 × 7 = 35, and 35 = 62-1, 11 × 13 = 143, and 143 = 122-1____________ .
- 3. Look at the following column: 2 / 3, 3 / 8, 4 / 15, 5 / 24, 6 / 35
- 4. Given the nth power of 2 = a, the nth power of 6 = B, find the value of 12 ν n
- 5. (- 3x to the second power) (x to the second power - 2x-3) + 3x (x to the third power - 2x to the second power - 5) =
- 6. Given that the 2x power of 3 = the 3x power of 4 = the 6th power of 12, the basic problem of finding the value of 3 / x + 2 / y is higher than one
- 7. When x tends to - 2, the second power of X + 2 / X is + 5x + 6
- 8. Vertex formula of x-square-5x + 6 function 4ac-b square / 4A is the b square in this one 25 or - 25
- 9. It is known that the power of 2m + n-3 of equation 5x + 7ym + 3n-1 = 2 is a quadratic equation with respect to X and Y. the value of M and N can be obtained Another question is: when x = y + 1, write a solution of this equation
- 10. What is the coefficient of the highest power term of the third power of 5x - the fourth power of 3x - the fifth power of 0.1X + 2?
- 11. [- 5 / 4] / 0.25 / [- 15 / 4] [- 2 / 5] square / [- 12 / 5] - 8 / 21 * [- 7 / 4] - 0.25
- 12. [- 5 / 4] / 0.25 / [- 15 / 4] [- 2 / 5] square / [- 12 / 5] - 8 / 21 * [- 7 / 4] - 0.25
- 13. 5 / 6 - (3 / 4-1 / 2) 2 / 5 + 2 / 3-2 / 5 a simple method requires a simple procedure What can be used is easy to use
- 14. How about three quarters minus x = two fifths
- 15. A simple method of multiplying 15 / 19 by 32
- 16. Simple calculation method of 1 / 3 * 4 + 1 / 4 * 5 + 1 / 5 * 6 + ······ + 1 / 19 * 20
- 17. Simple calculation method of 19 + 19 + 19 + 19 + 19 + 19 + 19 + 20
- 18. A simple method is used to calculate: 455 × 7.6 + 111 × 19.2 + 43.3 × 76
- 19. Simple calculation: 1 × 3:2002 + 3 × 5:2002 + 5 × 7:2002 + 7 × 9:2002 + 9 × 11:2002
- 20. Simple calculation of 1:11 6 + 2:9 7 + 3:7 3 + 4:11 5 + 5:7 4 + 6:9 1