Simple operation of fractions 1 / 9 by 3 / 85 by 18 by 51

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• 1. How to do 49 + 165 + 51 in a simple way
• 2. The difference of one minus fifty-one eighteen plus three minus fifty-one eighteen times two plus five minus fifty-one eighteen times three, all the way up to ninety-nine minus fifty-one eighteen
• 3. 1+3+5+7+9+… +95+97+99．
• 4. 1+99+2+98+3+97+4+96+.+99+1=
• 5. X in fraction^
• 6. Given the linear function y = (2m-1) x-3m + 4, what is the value of m when the intersection of its image and Y axis is above the X axis?
• 7. How to solve the equation XXX + X100?
• 8. -1/3,1/6,-1/9,1/12…… Write a general term formula of the sequence
• 9. （1）-4.2+5.7-8.4+10 （2）-1/4+5/6+2/3-1/2 （3）12+（-18）+（-7）-15 （4）4.7-（-8.9）-7.5+（-6）
• 10. Is it possible that the equation (2M2 + M-3) XM + 1 + 5x = 13 of X is one variable linear equation? Why (2M2 + M-3) XM-1 + 5x = 13? The 2 after "2M2" is an index. "M + 1" in "XM + 1" is a superscript and an index. "M-1" in "XM-1" is also a superscript and an index Sorry, it's a quadratic equation. Wrong number. Sorry
• 11. 10/9×3/85×18×51=?
• 12. (1/9×3/85)×18×51
• 13. 9:2000 / 2001 × 1949 (simple calculation) 1/4÷[（1/4+11/20)×3/4+0.05]
• 14. A simple calculation of 2000 / 2000 and 2000 / 2001
• 15. 9:2000 / 2001 * 1949
• 16. The calculation process of 1949x (1 / 51-1 / 2000) + 51x (1 / 1949-1 / 2000) - 2000x (1 / 1949 + 1 / 51) + 3
• 17. 46x35 + 55x35 - 35 grade four questions, please use a simple method to calculate
• 18. Simple calculation method of 96 * 68 + 48 * 64
• 19. A simple method is used to calculate: 35 × 68 + 68 + 68 × 64 =
• 20. 6 5 / 18 - (4 5 / 18-0.63) simple calculation method