4/1*39+4/3*27 求简便计算
39*1/4+27*0.25+34*25%的简算
1/(3/4+1/3)*39怎么简算
1,3分之4,?,27分之64
4分之1*39+4分之3*27 18.25*11又5分之4-17又4分之1除以(1-59分之54) 6分之1*35+6分
1/1×2+1/2×3+1/3×4+1/4×5+...+1/39×40
3-1选修物理,39页,练习题3,4
那1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 4
1,2,3,4,5,7,9,11,15,21,27,29,39,41,46,51,46哪些素数,哪些合数?
1,2,3,4,5,7,9,11,15,21,27,29,39,41,46,51,87 哪些是素数?哪些是合数?
1,2,3,4,7,9,13,16,23,27,31,.39,41,47,55,67,87,95哪些是合数,哪些是素数?
六年级简算3/7+7/11+11/15+15/19+19/23+23/27+27/31+31/35+35/39+39/4